General Science Grade 8 Past Paper PDF

General Science Grade 8 1. Which of the following is physical quantity? A. Texture B. Color C. Density D. Odor 2. Which of the following is not reliable indigenous mass metho...

General Science Grade 8 1. Which of the following is physical quantity? A. Texture B. Color C. Density D. Odor 2. Which of the following is not reliable indigenous mass method measurement? A. Weqet B. Feresula C. Tassa D. Quntal 3. Which of the following is a group of fundamental physical quantity? A. Electric current, luminous intensity, mass, length, velocity B. Mass, temperature, time, amount of a substance C. Force, temperature, time, amount of a substance D. Electric current, luminous intensity, temperature, time, acceleration 4. ___________ is a measurement of distance from the end of elbow to the tip of the middle finger. A. Digit B. Cubit C. Pace D. Arm span 5. A small ceramic cup often used for measuring coffee, pulses and spices. A. Jog B. Birchiko C. Sini D. Kubaya 6. Which of the following is not true about fundamental physical quantity? A. They cannot be express in terms of other quantity. B. They also known as base quantities. C. They depend on other quantities. D. They are only seven. 7. _____________ is the comparison of unknown quantity with known quantity. A. Prefix B. measurement C. accuracy D. Precision 8. Which of the following is basic unit? A. Kelvin B. Newton C. Joule D. Pascal 9. _____________ is measure of the duration for an interval. A. Volume B. Time C. Mass D. Luminous intensity 10. What is the value of "centi "? A. 1,000 B. 0.01 C. 0.001 D. 100 11. The temperature of a certain desert region is measured as 540k, this equal with____ degree Fahrenheit. A. 371.8 B. 521.6 C. 561.2 D. 731.8 12. The idea that matter is 'discrete' was proposed by: A. Aristotle B. Plato C. Democritus D. Dalton 13. Which of the following particles are located in the nucleus of an atom? A. Electron and neutron C. Proton and neutron B. Electron and proton D. Proton, electron and neutron 14. The subtraction of the atomic number from mass number in an atom is known as_______________ A. Number of neutrons C. Number of electrons B. Number of protons D. Atomic mass 1|Page Mr. Bisrat Gibru  General Science Grade 8 15. Which of the following steps of scientific investigation comes first? A. Formulate hypothesis B. Perform background research C. Test hypothesis and collect data D. Analyze the result and draw conclusion 16. The SI unit of time is : A. hour B. Minute C. Second D. Microsecond 17. Which of the following is true about Aristotle's theory of matter? A. He belief that all matter consists of very small, indivisible particles. B. He thought of atoms as moving particles and differed in shape and size. C. There is a limit to which matter is broken. D. He belief that all matter is divided into smaller and smaller parts, the division continuous forever without any limit. 18. What is the relative mass of electron? A. −1 B. +1 C. 2 D. 0 19. Which of the following is true about an atom? A. Most of the mass of an atom is in its electron B. Most of the volume of an atom is in its nucleus C. The nucleus contains negatively charged proton. D. All atoms can be identified by the number of protons and neutrons they contain. 20. Which of the following is false statement? A. Molecules of the elements consist of only one type of atoms. B. Nucleus is positively charged. C. Molecules of compounds consist of only one type of atoms. D. Neutrons have no charges. 21. Which of the following is monoatomic molecule? A. Argon B. Ozone C. Iodine D. hydrogen 22. The idea of 'atoms ' first proposed by the Greek philosopher__________________ A. Aristotle B. Plato C. Dalton D. Democritus 23. Prefix is: A. How close a measurement is to its accepted or known value. B. A short hand form of writing a very large or very small numbers. C. How close two or more measurements are each other. D. Kilo has a value of 1,000,000. 24. The unit of density is: A. m∕s B. Kg∕m3 C. Kg∕m2 D. Kg∕ m3S 2|Page Mr. Bisrat Gibru General Science Grade 8 23 25. The number of neutrons in 𝑁𝑎 are: 11 A. 11 B. 12 C. 13 D. 23 26. 1110 Km is equal with: A. 11,100m B. 111,000cm C. 1,110.000.000mm D. 11,100,000m 27. 20tone is equal with: A. 2,000quntal B. 2,000Kg C. 20,000 Kg D. 200,000 g 28. 37nm is equal with: A. 3,700pm B. 0.0037mm C. 0.0000037cm D. 0.00000037m 29. −40˚C is equal with: A. −104˚F B. −40˚F C. 313K D. 303K 30. 95 ˚F is equal with__________________ k. A. 308 B. 248 C. 203 D. 213 31. 388k is equal with_____________ ˚F. A. 257 B. 225 C. 125 D.239 32. 23.5 min is equal with_____________ hr. A. 1410 B. 141 C. 0.3916 D. 0.03916 33. 0.5 week is equal with_____________ min. A. 10,080 B. 5,040 C. 1440 D. 720 34. An atom which contains 23 and 47 atomic and mass number respectively. Which one is true about the atom? A. It contains 47 electrons. C. It contains 23 protons. B. It contains 23 neutrons. D. It contains 24 electrons. 35. Which of the following is diatomic molecule? A. Argon B. Ozone C. Oxygen D. Neon 36. Which of the following is polyatomic molecule? A. Neon B. helium C. Phosphorus D. hydrogen 37. The sum of The number of protons and neutrons in an atom is known as_____________ A. Number of electrons C. Mass number B. Atomic number D. Atomic mass 38. Which of the following molecule is molecule of element? A. CO2 B. CL2 C. H2O D. HCL 39. Which of the following is inorganic molecule? A. C2H5OH B. CaO C. C2H4 D. C12H22O11 40. _____________ Are hydrocarbons that have the general formula of (𝐶𝑛 𝐻2𝑛+2 ). A. Alkenes B. Alkanes C. Unsaturated hydrocarbons D. Alkynes 3|Page Mr. Bisrat Gibru General Science Grade 8 41. Which of the following formula represents an alkene containing seven carbon atoms? A. C7H7 B. C7H17 C. C7H14 D. C7H16 42. _____________is used for preservation of biological specimens. A. Formalin B. Ethanol C. Butane D. Ethyne 43. Which of the following formula represents an alkyne containing eight carbon atoms? A. C8H6 B. C8H14 C. C8H16 D. C8H18 44. _____________ is the main constituents of biogas that is used as a domestic fuel. A. Methane B. Propane C. Butane D. Ethanoic acid 45. Which of the following is the first organic compound which synthesized from inorganic compound? A. NH4CNO B. AgCNO C. (NH2)2CO D. NH4CL 46. Which of the following compound is found in alcoholic beverage? A. Ethanol B. Butanol C. Propanol D. Formalin 47. All of the following compounds are hydrocarbons except: A. Ethane B. ethyne C. ethene D. alcohol 48. _____________ is the measure of distance between two points. A. Mass B. Length C. Volume D. Time 49. _____________ is also known as fathom. A. Arm span B. hand span C. Pace D. Digit 50. _____________ is a measure of distance from the back of the heel to the tip of the big toe. A. Pace B. Foot C. Cubit D. Digit 51. _____________is a linear distance measure of a person's extended walk. A. Arm span B. hand span C. Pace D. Digit 52. The amount of matter present in a substance is called____________ A. Mass B. Volume C. Length D. Time 53. What is the relative charge of proton? A. −1 B. +1 C. 2 D. 0 54. Which of the following is true statement? A. Precise measurements should not be accurate. B. Precise measurements should be accurate. C. Precise measurements can be accurate or not. D. Precision depends on accuracy 55. Which of the following is false about discreteness theory of matter? A. Proposed by Democritus. B. There is a limit to which matter is broken. C. He believed in the existence of atoms. D. Matter is infinitely divisible. 4|Page Mr. Bisrat Gibru  General Science Grade 8 56. ____________is the measure of the space occupied by an object. A. Mass B. Volume C. Temperature D. Time 57. Which one of the following is the general formula of alkynes? A. 𝐶𝑛 𝐻2𝑛+1 B. 𝐶𝑛 𝐻2𝑛 C. 𝐶𝑛 𝐻2𝑛−2 D. 𝐶𝑛 𝐻2𝑛+2 58. The hotness or coldness of an object is called____________ A. Time B. Temperature C. Thermometer D. Kelvin 59. Which of the following steps of scientific investigation comes last? A. Formulate hypothesis B. Perform background research C. Test hypothesis and collect data D. Analyze the result and draw conclusion 60. Which of the following compound can be used in cutting and welding of steel and iron? A. Ethane B. ethyne C. ethene D. alcohol 61. Which of the following is not indigenous method of volume measurement? A. Tassa B. Cubit C. Sini D. Birchiko 62. ____________ Are group of chemicals that are obtained by the neutralization reaction. A. Oxides B. Salts C. Acids D. Bases 63. Which of the following is metallic oxide? A. CaO B. CO C. CO2 D. SO2 64. Formalin is used for preservation of biological specimens, because it makes proteins____ and _____. A. soft and insoluble C. hard and insoluble B. hard and soluble D. soft and soluble 65. ____________ is the only saturated hydrocarbons. A. Aromatic hydrocarbons C. Alkenes B. Alkanes D. Alkynes 66. ____________ always contains two or more atoms of different elements combined chemically. A. Monoatomic molecule C. polyatomic molecule B. diatomic molecule D. molecule of a compound 67. Which of the following is not a use of ethanoic acid? A. In the intoxication ingredient of many alcoholic drinks B. It is also used as food flavoring agent C. It is also used as disinfectant D. For preserving vegetables (pickling) 68. Which of the following is acidic oxide? A. Na2O B. K2O C. SO2 D. MgO 5|Page Mr. Bisrat Gibru  General Science Grade 8 69. The reaction of basic oxide with acid is given by the equation: CaO + H2SO4→ Y + H2O, What is the compound represented by "Y"? A. Ca(OH)2 B. CaSO4 C. CaO D. CaCl2 70. Which of the following represents potassium hydroxide? A. KOH B. NaOH C. Ca (OH)2 D. Mg (OH)2 71. Which of the following inorganic compounds have bitter taste? A. Acids B. Bases C. Oxides D. Salts 72. Dilute acids react with active metals to form____________ And___________ A. Salt, carbon dioxide and water C. salt and nonmetal B. Salt and water D. Salt and hydrogen 73. If you drink a base by accident, neutralizes it by drinking: A. Dilute solution of acetic acid B. Dilute solution of magnesium hydroxide C. Concentrated solution of acetic acid D. Concentrated solution of magnesium hydroxide 74. The white colored half moon shaped area of a nail is the: A. Nail fold B. nail plate C. lunula D. matrix 75. Which of the following is not true about upper layer of skin (epidermis)? A. It contains blood vessels, lymph vessels, sweat gland and sensory receptors. B. It is made up of dead cells C. It protects the body from UV ray and pathogens. D. It used to reduce excess loss of water. 76. The deepest layer of hair is: A. Medulla B. Cuticle C. Cortex D. Matrix 77. ___________ is a gland which is located in the ear canal and it produces ear wax for protection. A. Sudoriferous B. sebaceous C. Mammary D. ceruminous 78. The layer of skin that contains fatty tissue that used to store energy and act as insulation layer. A. Epidermis B. Dermis C. hypo dermis D. Middle layer 79. All are the functions of integumentary system except: A. Excretion B. thermoregulation C. Protection D. Digestion 80. 5 weeks is equal with____________ minutes. A. 3,024,000 B. 302,400 C. 840 D. 50,400 81. 59 ˚F is equal with____________ k. A. 15 B. 283 C. 288 D. 278 82. 1,000,000 g is equal with………____________. A. 100 Kg B. 1,000,000,000 pm C. 1 tone D. 1,000Quntal 6|Page Mr. Bisrat Gibru  General Science Grade 8 83. Which of the following steps of scientific investigation comes last? A. Communicating results C. Test hypothesis and collect data B. Perform background research D. Analyze the result and draw conclusion 84. Who was the first scientist that prepared organic compound from the reaction of inorganic compounds ammonium chloride and silver cyanate. A. Aristotle B. Democritus C. Newton D. Wohler 85. Which of the following metallic oxide has acidic property? A. CO2 B. Na2O C. WO3 D. SO3 86. The general formula of alkene is: A. CnH2n B. CnH2n +2 C. CnH2n −2 D. CnH2n + 1 87. The characteristics property of a base is the presence of: A. Hydroxide ion C. Hydride ion B. Hydrogen ion D. H+ 88. Which of the following oxides reacts with water to form an acidic oxide? A. Li2O B. Na2O C. SO2 D. MgO 89. Which one of the following cannot be used for neutralizes the acidic oxide? A. Ca(OH)2 B. CaO C. CaCO3 D. CaCl2 90. SulPhates are salts of: A. Nitric acid C. sulphuric acid B. Phosphoric acid D. Carbonic acid 91. Which of the following molecule is molecule of compound? A. Cl2 B. Br2 C. O3 D. HI 92. How many neutrons, protons and electrons are there in the atom of 35 atomic mass and 17 atomic number respectively? A. 35,17, 52 B. 18,17,17 C. 17,17,18 D. 18,17,35 93. Which group of elements are monoatomic molecules? A. Helium, neon and argon C. Ozone, Sulphur and phosphorus B. Hydrogen, oxygen and nitrogen D. Water, carbon and salts 94. The sum of the number of protons and neutrons in an atom is known as: A. Number of electrons C. Atomic number B. Mass number D. Atomic mass 95. Which of the following is true about an atom? A. Most of the mass of an atom is in its nucleus B. Most of the volume of an atom is occupied by its electrons C. The electrons are negatively charged whereas protons are positively charged particles. D. The relative mass of protons and neutrons is the same. 7|Page Mr. Bisrat Gibru  General Science Grade 8 96. An alkyne containing 10 hydrogen atoms is called___________________ A. Decyne B. Pentyne C. Hexyne D. Heptyne 97. Which is the formula of octane? A. C8H18 B. C8H16 C. C8H14 D, C9H18 98. Which is the formula of sodium sulphate? A. Na2SO4 B. CaSO4 C. K2SO4 D. NaSO4 99. Which part of the nail is responsible for the growth of the finger nail? A. Cuticle B. Matrix C. Nail bed D. Nail plate 100. ____________. is a skin disease which is caused by when the pores of the skin becomes blocked with oil, dead skin or bacteria. A. Acne B. Rosacea C. Eczema D. Hives 101. Warts caused by: A. Human papilloma virus C. Staphylococcus aureus B. Herpes simplex virus D. Varicella zoster virus 102. Which component of muscular system is found inside of vital organ blood vessels, eye, air way and organs such as stomach, digestive, reproductive, urinary tracts, and others? A. Smooth muscles C. Heart muscles B. Skeletal muscles D. Cardiac muscles 103. All are neutralization reactions except: A. H2SO4 + 2NaOH → Na2SO4 + 2H2o B. Co2 + 2NaOH → NaCO3 + H2o C. Na2O + H2SO4 → Na2SO4 + H2o D. Zn + H2SO4 → ZnSO4 + H2 104. Which one is the SI unit of density? A. m∕s B. m∕S2 C. Kg∕m3 D. m3 105. Which one of the following subatomic particles has zero charge? A. Electron B. Neutron C. Proton D. Nucleus 106. One of the following is not the use of ethanol. A. In clinics and hospitals to clean wounds. B. Used in the intoxication ingredient of alcoholic beverages. C. Used for cooking, heating and generating electricity. D. Used as fuel by mixing with petrol. 107. ____ is a gland which releases oil into the skin through hair follicles to lubricate and protect hair shaft. A. Sudoriferous gland C. Ceruminous gland B. Mammary gland D. Sebaceous gland 8|Page Mr. Bisrat Gibru  General Science Grade 8 108. KNO3 is used to: A. Fertilizer C. Tree stump removal B. Rocket propellants D. All 109. Which of the following formula represents potassium hydroxide? A. NaOH B. KOH C. Mg(OH)2 D. Ca(OH)2 110. Which of the following is true about bases? A. They have bitter taste B. They change the color of indicators C. They neutralize acids D. All 111. Which of the following is true statement? A. All hydrocarbons are inorganic compounds. B. All organic compounds are hydrocarbons. C. All organic compounds contain carbon and hydrogen along with other possible elements such as oxygen, nitrogen, halogens and phosphorus. D. CO2, CO, CO3 and HCO3 are examples of organic compounds. 112. Which of the following is odd? A. HCl B. LiOH C. H2SO3 D. D. HNO3 113. ___________________ the middle layer of hair and provides strength, color and texture of hair shaft. A. Medulla B. Cortex C. Cuticle D. HNO3 114. _______________ is located in ear canal and produces ear wax for protection. A. Sudoriferous gland C. Ceruminous gland B. Mammary gland D. Sebaceous gland 115. Which of the following is true statement? A. Tooth paste contains acids that neutralizes the base produced by bacteria in our mouth. B. Vinegar is base in nature which is used to cure bee sting and ant sting. C. Baking powder is alkaline which is used to cure wasp sting. D. The acidic as from the decomposition of compost neutralizes the alkalis in basic soil. 116. Which layer of skin has blood vessels, sweat gland, sensory receptors and hair follicles? A. Dermis B. Epidermis C. Hypodermis D. Lower layer 117. Which one of the following bones are compacted, tubular filled with yellow bone marrow? A. Long bones B. Flat bones C. Irregular bones D. Short bones 118. Which group of bones are examples of short bones? A. Wrist, finger and toe bones B. Radius, ulna, femur, tibia, fibula and humerus C. Ribs, sternum, cranial bone and scapula D. Hip bone, facial bone and vertebrae 9|Page Mr. Bisrat Gibru  General Science Grade 8 119. ____________are located only in the heart and they are responsible to pump blood around the body by involuntary action. A. Smooth muscle C. Skeletal muscle B. Cardiac muscle D. Voluntary muscle 120.Which one of the following skin diseases that has symptoms such as itchy, red rash, that breaks out on the face, scalp, chest, back and to lesser extent arms and legs? A. Latex allergy B. Chickenpox C. Blister D. Warts 121. Which of the following are examples of male primary sexual characteristics? A. uterus and ovaries B. pubic hair and enlargement of breast C. widening of chest and shoulder D. tests and scrotum 122. In the reproductive system of human male, the tube that serve as a passage for both urine and semen is A. ureter B. urethra C. vas deferens D. epididymis 123. The end of fertility in the reproductive cycle of human female is known as A. puberty B. menopause C. menstruation D. adolescence 124. Which of the following is matched correctly? A. Testes – ovum C. prostate gland – alkaline fluid B. ovary – testosterone D. urethra – progesterone 125. An example of secondary sexual characteristics of males and females is A. menstrual cycle C. enlargement of genital organs B. widening of chest and shoulder D. deepening of voice 126. Which type of teeth are not found in a five years old baby? A. premolars B. Molars C. Incisors D. Canines 127. Which of the following is an immovable joint? A. Skull B. Shoulder C. Knee D. Hip 128. Bones are attached to one another with a tissue called A. cartilage B. tendon C. ligament D. joints 129. Which of the following types of muscles never tire? A. Smoot muscles B. Skeletal muscles C. cardiac muscle D. rough muscle 130. The male reproductive structure that helps to lower the temperature of the testes is:- A. Epididymis B. Scrotum C. penis D. cowper’s gland 5 2 5 3 131. If a given animal has a dental formula of , , , , how many the lower jaw teeth does the animal have? 4 6 7 4 A. 72 B. 42 C. 30 D. 36 132. _______________ stores sperm cells for maturation. A. Cowper’s gland B. Epididymis C. scrotum D. testes 10 | P a g e Mr. Bisrat Gibru  General Science Grade 8 133. _________________ is an erectile and sensitive tissue like a penis. A. Cervix B. Clitoris C. vulva D. vagina 134. Suppose a woman has a regular menstrual cycle. If her menstruation begins on Meskerem 24, the process of ovulation is expected to occur in the days between:- A. Tikimt 19 – 25 C. Meskerem 19 – 25 B. Tikimt 05 – 11 D. Meskerem 05 – 11 135. Which one of the following does not affect the reproductive health of a woman? A. Early marriage C. Abstinence from sexual activity B. Illegal abortion D. Female circumcision 136. Which of the following is true about menopause? Menopause is the age that marks the:- A. End of giving birth in males C. beginning of sperm cell production B. Beginning of menstrual cycle D. end of giving birth in females 137. Ovaries are the female reproductive glands that are made up of: A. Seminiferous tubules cells C. germinal epithermal cells B. Graafian follicles cells D. seminal tubule 138. Which one of the following components of a muscular system that can be consciously or voluntarily controlled muscles and they are contracting for the causes of movement of bones for chewing, talking and drinking? A. Smooth muscles B. Cardiac muscles C. Heart muscles D. Skeletal muscles 139.Which of the following is the ability of a muscle to give response to stimuli which comes from motor neurons and hormones? A. Contractility B. Extensibility C. Excitability D. Elasticity 140.Which one of the following is a group of inherited disease characterized by weakness and leads to eventually loss of strength, increasing disability and possible deformity? A. Muscular dystrophy C. Muscle breakage B. Muscle strain D. Muscle fracture 141. Which one of the following are compact bones with chambers or partitions but without marrow? A. Long bones B. Short bones C. Flat bones D. Irregular bones 142. Which one of the following is not the component of axial skeleton? A. Skull B. Vertebral column C. Shoulder bone D. Hyoid 143. Which one of the following is the function of the skeleton system? A. Movements C. Protection and supports B. Produce blood cells D. All of the above 144. Which one of the following is a disease of skeletal system that involves degradation of joints and its main symptoms are joint pain, tenderness, stiffness, locking and effusion? A. Leukemia B. Osteopenia C. Osteoporosis D. Osteoarthritis 11 | P a g e Mr. Bisrat Gibru  General Science Grade 8 145. In which one of the following digestive systems the food digestion starts? A. Mouth B. Stomach C. Small intestine D. Anus 146. Which one of the following diseases of digestive system that causes inflammation, irritation or erosion of the lining of the stomach? A. Diarrhea B. Hemorrhoids C. Gastritis D. constipations 147. Which one of the following respiratory systems that has the hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals? A. Pharynx B. Bronchus C. Alveoli D. Larynx 148. Ato Melkamu is 65 years old man. Suddenly Ato Melkamu has felt an illness and his families take him to the nearest Hospital; the medical doctor carefully diagnosis his condition and the result of the diagnosis shows that his blood pressure is increased so that the doctor advised him to perform regular physical exercise, minimize the consumption of salts, sugars and fatty foods and frequently checking up to the nearest clinic. What is the type of disease or disorder was Ato Melkamu had caught? A. Heart attacks B. Hypertensions C. Strokes D. Heart failure 149. Which part of the heart used to receive oxygenated blood from the lung? A. Right atrium B. Left atrium C. Left ventricle D. Right ventricle 150. Which one is true statement? A. Upper parts of the heart used to pump blood to the body. B. Lower parts of the heart used to receive blood from different part of the body. C. The left side of the heart carries out oxygenated blood. D. The upper parts of the heart have muscular and thick walls. 151. Which one is the correct pathway of deoxygenated blood flow? A. body→ vena cava →right atrium→ right ventricle →pulmonary artery →lung B. Body → right atrium→ right ventricle →pulmonary artery→ lung C. lung → right atrium→ right ventricle →pulmonary artery→ vena cava →body D. lung → pulmonary vein→ left atrium→ left ventricle →aorta→ body tissue 152. Which of the following cannot be considered as an example of mutualism? A. Lichen C. Flowers and pollinators B. Ruminant animals and anaerobic bacteria D. Epiphytes and trees 12 | P a g e Mr. Bisrat Gibru  General Science Grade 8 153. _________________ is the causative agent of chancroid. A. Treponema palladium B. Neisseria gonorrhea C. Hemophilus ducreyi D. Mycobacterium tuberculosis Item “154” is based on the pyramid of energy given below Pyramid energy R S T U 154. Which of the tropic levels represented by letters R, S, T and U in the pyramid, receive the least energy? A. “R” B. “S” C. “T” D. “U” ▲ Question number 155 and 156 are based on the following food chain. Grass→ Mouse → Snake → Hawk 155. Which organism is herbivore in the above food chain? A. Snake B. Hawk C. Grass D. Mouse 156. An organism on the second trophic level is: A. Grass B. Hawk C. Snake D. Mouse 157. Testes produces: A. testosterone and female sex cell C. testosterone and male sex cell B. estrogen and female sex cell D. estrogen and male sex cell 158. HIV attacks the human body by: A. Killing the skin cells and breathing organ B. Killing the different body tissues and cells C. Destroying the immune system D. Damaging the nervous system 159. ______ is the practice in which mostly female are forced, intimated to the act of sexual intercourse. A. Early marriage C. Female genital mutilation B. Illegal abortio D. Rape 160. Which of the following are examples of abiotic factors of an ecosystem? A. Decomposers and scavengers C. Plants and soil B. Water and minerals D. Producers 13 | P a g e Mr. Bisrat Gibru  General Science Grade 8 161.How HIV/AIDS reduce productivity of an individual? By A. increasing incomes of the family B. reducing number of orphans and widows C. reducing a person’s ability to work D. decreasing separation of family 162.If a grass is eaten by mouse, the mouse is also eaten by the snake and finally the snake is eaten by hawk, what do you call such feeding relationship of organisms in an area? A. Food chain B. Parasitism C. Food web D. Mutualism 163. All of the living organisms and non-living part of a specific area and their interaction is termed as A. biosphere B. habitat. C. community. D. ecosystem Consider the following diagram of menstrual cycle. w 164. Which of the following processes is represented by letter “W” in the above diagram? A. Menopause B. Ovulation C. Fertilization D. Implantation 165. Which of the following is true about pyramid of energy? A. High energy is found in each next trophic level. B. Less energy is found in each next trophic level. C. Energy is transferred from secondary to primary consumer. D. Energy is neither lost nor transferred in each trophic level. ▲ Grasses →Grass hopper → Frogs → Snakes → Hawks 166. _______________ occurs when the blood supply to part of brain is interrupted or reduced. Preventing brain tissue from getting oxygen. A. heart attack B. heart failure C. stroke D. hypertension 167. __________ is a muscular bag that produces enzymes like pepsion. renin, trypsin and also HCl. A. Small intestine B. stomach C. large intestine D. pancreas 168. the erectile sensitive tissue in female reproductive organ is A. vulva B. Clitoris C. Uterus D. vulva 14 | P a g e Mr. Bisrat Gibru  General Science Grade 8 169. Which of the following is the correct pathway of the female reproductive system inner to outer? A. Ovary→ fallopian tube → uterus → cervix → vagina B. Fallopian tube → ovary →uterus →cervix→ vagina C. Vagina → ovary → oviduct → uterus → cervix D. Vagina →cervix →uterus→ oviduct→ ovary 170. The region of the teeth that consists of blood vessels and nerve cells is called____________ A. Dentine B. Pulp cavity C. Enamel D. Neck 171. Association of two different species where one is benefited and the other is neither harmed nor benefited is: A. commensalism B. saprophytism C. Mutualism D. Parasitism 172. Which one of the following IS NOT a function of the female reproductive system? A. To produce eggs. B. To excrete water C. To give birth to a baby. D. To take care of the developing baby during pregnancy. 173. When puberty place in boys, which one of the following does not happen? A. Penis enlarges. B. Voice becomes thinner. C. Shoulders and chest broaden. D. Growth of pubic and facial hairs. 174. ________________ is reduction of nitrate back to inert gas (N2) completing the nitrogen cycle. A. Nitrification C. Nitrogen fixation B. Ammonification D. Denitrification 175. The organisms that play great role in all nutrient cycle is called ____________ A. Producer B. Plant C. herbivore D. Decomposer 176. The type of soil which is suitable for making pottery is: A. Sandy soil B. Loam soil C. Clay soil D. Top soil 15 | P a g e Mr. Bisrat Gibru  General Science Grade 8 177. The following diagram of water cycle is given. In the above diagram letter “B” indicates A. precipitation B. evaporation C. condensation. D. transpiration. 178. the interaction between similar species of organisms is called____________ A. Interspecific B. Intraspecific C. Symbiosis D. Ecosystem 179.denitrification is carried by bacteria: A. Nitrobacter and Nitrosomonas B. pseudomonas and clostridium C. Azotobacter D. Bacillus ramosus and bacillus vularis 180. The main driving factor in oxygen cycle in nature: A. Photosynthesis B. chemosynthesis C. Respiration D. Nitrification 181.Which one of the following IS NOT the indigenous unit of length measurement? A. Hand Span B. Cubit C. Weqet D. Foot 183.Which one of the following IS NOT fundamental physical quantity that does not match with its SI units? A. Length- meter C. Temperature- candela B. Mass- kilogram D. Time - second 184.Which one of the following indigenous units of measurement used to measure the mass of peppers and coffees in different Ethiopian local markets? A. Feresula B. Quintal C. Weqet D. Tassa 185.Which one of the following IS NOT a derived physical quantity? A. Area B. Mass C. Volume D. Speed 16 | P a g e Mr. Bisrat Gibru General Science Grade 8 186.If the distance from the Sun to the Earth is 150,000,000,000m,which one of the following is the appropriate way of expressing this distance in terms of prefixes? A. 150Km B. 150,000Mm C. 150,000,000cm D. 0.00015µm 187.Abel is a grade eight student. He decided to measure his height, weight and the time taken from his school to home. As the result of his measurements; his height is 160cm, his weight is 55kg and he takes eight minutes to arrive his school from his home. Which one of the following describes his measurements in their respective SI units? A. 1.6m, 55kg and 240s. C. 160cm, 55kg and 240s. B. 160cm, 5500g and 480s. D. 1.6m, 55kg and 480s. 188.Which one of the following is the first step of the scientific methods of scientific investigation? A. Performing Background Research C. Establish Your Hypothesis B. Analyze the Results and Draw Conclusion D. Ask Questions 189.Grade eight students want to do an activity. They first take a candle, fix it on a table and lit the candle and the candle will continue to be burned due to the presence of oxygen. Which scientific investigation do the students confirm in their activity? A. Ask Questions C. Formulate Hypothesis B. Test the Hypothesis by Experiment D. Background Research Figure 1. The Target of a Dart player 190. Which one of the following best describes the precision and accuracy of the player in hitting the center of the target of the game? A. Precise but not accurate C. Both precise and accurate B. Accurate but not precise D. Neither precise nor accurate 17 | P a g e Mr. Bisrat Gibru General Science Grade 8 191.Fetiya is a grade 8 student and she observed the measurements of different quantities when she visited one of the Markets in Addis Ababa with her mother. She classified the methods of measurements into indigenous or not after her observation. Which one of the following IS NOT the indigenous method of measuring quantities in her observation? A. Measuring the amount of oil by Jog. B. Measuring the length of a cloth by Meter Tape. C. Measuring the amount of teff by Quintal. D. Measuring the amount of coffee by Sini. 192.Who was the scientist that studied about the discreteness of matter? A. Democritus B. Aristotle C. Dalton D. Plato 193.Which of the following fundamental subatomic particles are found in the nucleus of an atom? A. Protons and electrons C. Neutrons and electrons B. Protons and neutrons D. Protons, neutrons and electrons 194.Which one of the following fundamental subatomic particle is negatively charged? A. Electron C. Neutron B. Proton D. Both proton and neutron 195.The atomic number and atomic mass of an atom is represented by the symbol many numbers of protons, electrons and neutrons are there in this atom? A. 8 protons, 8 electrons and 7 neutrons. B. 7 protons, 8 electrons and 8 neutrons. C. 8 protons, 7 electrons and 8 neutrons. D. 8 protons, 8 electrons and 8 neutrons. 196.Which one of the following IS NOT TRUE about the fundamental subatomic particles of an atom? A. The protons and electrons have the same numbers. B. The protons and neutrons have equal masses. C. The protons and electrons are located in the nucleus of an atom. D. The protons and electrons have opposite charge 197.Which one of the following subatomic particle is located around an atom? A. Electron C. Neutron B. Proton D. Both proton and electron 198.Which one of the following is not a diatomic molecule? A. A. B B. C. C. D. D 18 | P a g e Mr. Bisrat Gibru General Science Grade 8 199.Which one of the following molecules contain more than three atoms of an element? A. Monoatomic molecules B. Diatomic molecules C. Polyatomic molecules D. Both monoatomic & diatomic molecules 200.Which one of the following IS NOT the molecule of compound? A. H2O B. CO2 C. O3 D. CO 201.Which type of compound is obtained from living organisms? A. Organic compounds. B. Inorganic compounds. C. Both organic and inorganic compounds. D. Neither organic nor inorganic compounds. 182.Which one of the following is the formula of an alkyne with four carbon atom? A. C 4 H 6 B. C4H8 C. C4H4 D.C4H10 183.Which one of the following is the hydrocarbon used as a fuel for cooking, heating and generating electricity? A. Propane B. Methane C. Butane D. Pentane 184.Which one of the following is the hydrocarbon used in cutting and welding of steel and iron? A. Ethane B. Ethyne C. Butane D. Ethanol 185.A general science teacher used a chemical in preserving biological specimens like snake, lizard, spider and frog in order to place them in a laboratory for a long times. Which chemical has the teacher used to preserve the specimens? A. Acetic acid B. Ethanoic acid C. Vinegar D. Formalin 186.Which one of the following is a binary compound containing oxygen and other elements? A. Acids B. Bases C. Salts D. oxides 187.Which one of the following is not an example of metallic oxide? A. SO2 B. Na 2 O C. CaO D. K2O 188.Which one of the following inorganic compound has a sour taste? A. Oxides. B. Acids. C. Bases. D. Salts. 189.Which of the following IS NOT TRUE about the properties of bases? A. Bases have bitter taste. B. Bases change the litmus paper from red to blue. C. Bases neutralize acids. D. Bases change methyl orange indicator from yellow to red. 19 | P a g e Mr. Bisrat Gibru General Science Grade 8 190.Which of the following safety precaution measure you should not take when a base is spilled on your skin? A. Wash the affected part with plenty of water. B. Wash the affected part with weak base. C. Treat the affected part with a weak acid. D. Treat the affected part with medical treatment. 191.When a person accidentally drinks corrosive acid, his families have taken him to the nearest clinic. The doctor in the clinic carefully diagnoses his condition and prescribed a medicine that neutralize the acid in his body. What is the appropriate medicine the doctors has been prescribed so as to treat the patient? A. Milk of magnesia B. Dilute HCl C. Dilute.D. Dilute 192.Which of the following is not a precaution that you should take when you are working with acids and bases in a laboratory? A. Wearing eye protection goggle. B. Wearing protective clothes. C. Never taste any chemicals but smell some chemicals. D. Never add water on a concentrated acid solution. 193.Which one of the following neutralization reaction can be done in our everyday life? A. Using tooth paste to protect our teeth from bacteria. B. Using antiacids like to neutralize excess acids in the stomach. C. Using baking powder which is use to cure bee stings and ant bites. D. Using acidic soil to treat powered lime. 194.The interaction of organisms in which one organism benefited while the other organism is neither benefited nor harmed is called ____________ A. Commensalism B. mutualism C. predation D. protocooperation 195.Which of the following formula represent sulphuric acid? A. HCl B. H2 SO4 C. H2CO3 D. HNO3 196.Which one of the following is a component of an integumentary system that keeps your skull warm and gives beauty for women? A. Skin B. Glands C. Nail D. Hair 197.Which part of your nail that is responsible for the growth of your fingers nail? A. The matrix B. The lunular C. The nail folds D. The cuticle 20 | P a g e Mr. Bisrat Gibru General Science Grade 8 198.Which one of the following skin disease that has symptoms such as itchy, red rash that breaks out on the face, scalp, chest, back and to a lesser extent arms and legs? A. Latex allergy B. Chicken pox C. Blister D. Warts 199.Which one of the following components of a muscular system that can be consciously or voluntarily controlled muscles and they are contracting for the causes of movement of bones for chewing, talking and drinking? A. Smooth muscles C. Heart muscles B. Cardiac muscles D. Skeletal muscles 200.Which of the following is the ability of a muscle to give response to stimuli which comes from motor neurons and hormones? A. Contractility B. Extensibility C. Excitability D. Elasticity 201.Which one of the following is a group of inherited disease characterized by weakness and leads to eventually loss of strength, increasing disability and possible deformity? A. Muscular dystrophy C. Muscle breakage B. Muscle strain D. Muscle fracture 202.Which one of the following are compact bones with chambers or partitions but without marrow? A. Long bones B. Flat bones C. Short bones D. Irregular bones 203.Which one of the following is not the component of axial skeleton? A. Skull B. Vertebral column C. Shoulder D. Bone 204.Which one of the following is the function of the skeleton system? A. Movements C. Protection and supports B. Produce blood cells D. All of the above 205.Which one of the following is a disease of skeletal system that involves degradation of joints and its main symptoms are joint pain, tenderness, stiffness, locking and effusion? A. Leukemia B. Osteopenia C. Osteoporosis D. Osteoarthritis 206.In which one of the following digestive systems the food digestion starts? A. Mouth B. Stomach C. Small intestine D. Anus 207.Which type of teeth is long, sharp pointed edge and used to tearing and piercing? A. Incissors B. Canines C. Premolars D. Molars 208.Which one of the following disease of digestive system that causes inflammation, irritation or erosion of the lining of the stomach? A. Diarrhea B. Gastritis C. Hemorrhoids D. constipations 21 | P a g e Mr. Bisrat Gibru General Science Grade 8 209.Which part of the nose filter out dust particles and pathogens from inhaled air? A. The mucus C. The hair B. The good blood supply D. The large surface area 210.At has the hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals? A. Pharynx B. Bronchus C. Alveoli D. Larynx 211.One of the following IS NOT disease of respiratory system? A. Asthma B. Peptic ulcer C. Sinusitis D. Influenza 212.Which one of the following IS NOT the component of blood circulatory system? A. The heart B. The blood vessel C. The blood D. The lungs 213.Which part of the heart used to receive oxygenated blood from the lung? A. Right atrium B. Left atrium C. Left ventricle D. Right ventricle 214.Which type of the blood vessel used to carry blood away from the heart into different part of our body? A. Artery B. Vein C. Capillaries D. Pulmonary veins 215.Ato Melkamu is 65 years old man. Suddenly Ato Melkamu has felt an illness and his families take him to the nearest Hospital; the medical doctor carefully diagnosis his condition and the result of the diagnosis shows that his blood pressure is increased so that the doctor advised him to perform regular physical exercise, minimize the consumption of salts, sugars and fatty foods and frequently checking up to the nearest clinic. What is the type of disease or disorder was Ato Melkamu had caught? A. Heart attacks B. Hypertensions C. Strokes D. Heart failure 216.In which one of the following the mature sperms are accumulated in the collected ducts? A. Testes B. Urethra C. Urinary tract D. Gall bladder 217.Which one of the following IS NOT a function of the female reproductive system? A. To produce eggs. B. To give birth to a baby. C. To excrete water. D. To take care of the developing baby during pregnancy 218.When puberty place in boys, which one of the following does not happen? A. Penis enlarges. B. Shoulders and chest broaden. C. Voice becomes thinner. D. Growth of pubic and facial hairs. 22 | P a g e Mr. Bisrat Gibru General Science Grade 8 219.Which one of the following is the fusion of the male and female gamete to form a zygote? A. Menstruation B. Pollination C. Ejaculation D. Fertilization 220.of the following is a measure of the distance between two points? A. Measurement B. Mass C. Length D. Time 221.Which one of the following is an indigenous method of measuring mass? A. Digit B. Cubit C. Jog D. Weqet 222.Which one of the following is true about fundamental and derived physical quantities? A. Fundamental physical quantities depend on one or more derived quantities. B. Fundamental quantities cannot be expressed in terms of any other quantities. C. Length, mass, time, and temperature are derived quantities. D. Density, speed, volume, and area are fundamental quantities. 223.What is the SI unit of speed? 2 3 3 A. m/s B. m/s C. kg/m D. m 224.What is the prefix that represents 1000? A. Centi B. Kilo C. Mega D. Milli 225.Suppose you measure the actual mass of 5kg. Sugar five times and you get 1.5kg, 1.45kg, 1.40kg, 1.38kg. and 1.35kg. Which one is true about this measurement? It is A. Accurate but not precise C. Neither precise nor accurate B. Accurate and precise D. Precise but not accurate 226.One of the following is the last step in scientific investigation? A. Analyse data C. Communicating results B. Test hypothesis D. Draw conclusion 227.Who was proposed the idea that matter is discrete? A. Aristotle B. Democritus C. Dalton D. Plato 228.Which one of the following is correct about continuous theory of matter? A. Rejected the idea of atoms C. Limit matter is broken B. Proposed by Democritus D. Believed the existence of atom 229.An atom is surrounded by A. Neutron B. Proton C. Shell D. Electron General Science Grade 8 230.Which of the following subatomic particle has zero charge? A. Electron B. Proton C. Neutron D. Nucleus 231.If a certain nucleus consists of 9 protons and 10 neutrons. What is mass number of a nucleus? A. 1 B. 9 C. 10 D. 19 232.Which of the following is the term refers to all compounds that do not contain carbon generally found in non-living things. A. Organic compounds C. Ammonium cyanate B. Inorganic compounds D. Hydrocarbon 233.Which of the following compound is organic compound? A. NaCl B. CO2 C. CaO D. C2H4 234. A compound that contains only carbon and hydrogen atom is : A. Inorganic B. Hydrocarbon C. homologous D. Alkanes 235. The general formula of alkenes is : A. CnH2n B. CnH2n+2 C.CnH2n-2 D. CnH2n+1 236.Which of the following formula represents alkyne containing eight carbon atoms? A. C8 H16 B. C8H18 C. C8 H14 D. C8H16 237.Which of the following is true about homologous series? A. Differ by two carbon and one hydrogen atom B. Differ from the next by one methylene C. Differ from the next by two methylene D. Differ by only one carbon atom 238.The name of H6H12 is A. Hexane B. Hexyne C. Heptane D. Hexene 239. Which of the following are the main constituents of biogas? A. Methane B. Propane C. Ethane D. Ethanol 240. Which of the following is an example of acid? A. CaO B. NaOH C. HCl D. NaCl 241.Which of the following is non- metallic oxide? A. MgO B. Na2O C. SO2 D. CaO 242. This item is based on the following list of properties 1. React with water to form acid 2. React with water to form base 3. Mostly non-metallic oxide 4. Mostly metallic oxide General Science Grade 8 From the above lists which of them properties of base? A. 1,3 B. 2,3 C. 1,4 D. 2,4 243.Which of the following is an example of basic oxide? A. Carbon dioxide C. calcium oxide B. Sulphur trioxide D. carbon Mon oxide 244.A group of substance that release hydrogen ion when they are in aqueous solution is: A. Oxides B. Acids C. Bases D. Hydrocarbon 245.Which of the following is correct about bases? Bases have A. Bitter taste B. Sour taste C. Sweet taste D. No taste 246.What is neutralization reaction? the reactions of A. Acids with carbonate C. Oxides with hydrocarbon B. Bases with oxide D. Acids with bases 247.What measures should you take if a concentrated acid spilled on your skin? A. Drink a base such as Mg(OH)2 B. Wash thoroughly the affected part with water C. Wash thoroughly the affected part with sanitizer D. Warm the affected part with fire 248.Which of the following is salt? A. H2CO3 B. HCl C. NaCl D. Ca(OH)2 249.Which part integumentary system correctly matches with its function? A. Hair- covers the internal parts of the body B. Glands- secret important substances C. Nail- keeps your skull warm D. Skin- protect inner part of finger 250.Which of the following is the upper layer of the skin? A. Epidermis B. Dermis C. Hypodermis D. medulla 251. Which of the following skin disease is caused by the pores of skin blocked with oil, dead skin or bacteria? A. Rosacea B. Eczema C. Hives D. Acne 252. Which of the following systems play a role in moving speaking and chewing? A. Circulatory System C. Muscular System B. Integumentary system D. Respiratory system 253.Which if the following muscle located only in the heart? A. Cardiac muscle C. Skeletal muscle B. Smooth muscle D. non striated General Science Grade 8 254. An injury to a muscle or a tendon the fibrous tissue that connects muscles to bones is: A. Muscle dystrophy C. Muscle elasticity B. Muscle strains D. Muscle contractility 256.Components of skeletal system provides flexible and elasticity structures like nose is: A. Bone B. Tendon C. ligament D. cartilage 257.Which of the following is not the function of skeletal system? A. Produces blood cells C. Absorption of mineral B. Protection and supports D. storage of substance 258.Which of skeletal system disease is a break in the continuity of the bone? A. Osteopenia C. fracture B. Leukaemia D. Osteoarthritis 259. Which of the following are not components of digestive system? A. Anus B. Esophagus C. Stomach D. pharynx 260.The main function of human digestive system is A. Break down of food molecules into smaller and useable forms B. Circulate digested foods throughout our body C. Movement of body structure D. Protect and support the body of an organism 261.The dental formula of a man is what is the total number of canines? A. 2 B. 4 C. 6 D. 8 262.Which of the following is disease of digestive system swollen veins in your lower rectum? A. Gastritis B. Constipation C. haemorrhoids D. Diarrheal 263. Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place A. Pharynx B. Larynx C. bronchus D. Alveoli 264.One of the following is not a disease of respiratory system which one? A. Bronchitis B. Strokes C. Sinusitis D. asthma 265.In systematic circulation the blood flows between only:- A. heart and lungs C. heart and liver B. heart and kidney D. hearts and other body parts 266.The chamber of the heart it pumps the blood at long distance of the body A. Right atrium B. Left atrium C. left ventricle D. Right ventricle 267.Which of the following disease of circulatory system is called high blood pressure? A. Hypertension B. Heart C. strokes D. heart failover  General Science Grade 8 268.What is the function of epididymis? It is used to A. Secret mucus to lubricate the ends of urethra B. Store immature sperm cells for maturation process C. Produce alkaline fluids for sperm cells motility D. Ventilate testicles to have a lower temperature 269.Which one of the following is part of the reproductive structures of human male? A. Fallopian tube B. Uterus C. cervix D. urethra 270.Which of the following is the secondary sexual characteristic of a human male? A. Possession of testicles C. Ejaculator of sperm B. Born with scrotum D. possession of penis 271.Which of the following is a primary sexual characteristic of females? A. Production of sex hormones B. Presence of vagina ,ovaries and uterus C. Enlargement of genital organs D. Development of derive to the opposite sex 272.Which of the following is the monthly discharge of blood through vagina? A. Menstruation B. Ovulation C. Ejaculation D. excretion 273. Which of the following STD is caused by viruses A. Gonorrhea B. Chancroid C. AIDS D. Syphilis 274.What is ecosystem? It is A. A group of populations of different species living together B. A place where living organism live and produce C. The surface of the earth which is occupied by living things D. All organisms in the given habitat and their interactions 275. Which of the following is abiotic component of the ecosystem? A. Sunlight B. Animal C. plants D. bacteria 276. In which of biological interaction one organism is benefited and the other is harmed? A. Completion B. Parasitism C. mutualism D. commensalism Question number 277 and 278 are based on the following information Suppose the following organisms Eagle, Grass, Rat, and Snake are living together in a given habitat. 277.Which of the following shows the correct food chain the habitat? A. Grass Rat Eagle snake B. Grass Snake Rat Eagle C. Grass Eagle Rat Snake D. Grass Rat Snake Eagle General Science Grade 8 278.Which one the following organisms belongs to the tertiary consumer? A. Eagle B. Grass C. Snake D. Rat 279. Food web different from food chain by A. Energy flows in one direction B. Direct and simple feeding systems C. There are more than one food chains D. There is only one food chain 280.Which of the following pyramid is more accurate representation of the energy contents at each trophic level? A. Pyramid of number C. Pyramid of biomass B. Pyramid of Energy D.Pyramid of graphic 281.122˚F is equal with ___________ k A. 223 B. 151 C. 323 D. 50 282.1440 minutes are equal with___________ A. 0.1428weeks B. 60hours C. 88,000 seconds D. 2 days 283.55km is equals with___________ A. 55500dam B. 555000dm C. 550,000m D. 550hm 284.Mass of an object is measured by a device called___________ A. Clock B. Stop watch C. balance D. thermometer 285.What is the value of prefix “Mega”? A. 1,000 B. 1,000,000 C. 1,000,000,000 D. 1,000,000,000,000 286.Which of the following is acidic oxide? A. CO2 B. CaO C. K2O D. MgO 287. Reaction of acids with carbonates and hydrogen carbonates to form______ ,_____ and ______ A. Base, water and carbon dioxide C. salt, base and carbon dioxide B. Salt, water and carbon dioxide D. salt and hydrogen gas. 288. Which one is neutralization reaction? A. Ca + 2 HCl → CaCl2 + H2 B. H2SO4 + Ca (HCO3)2 → CaSO4 + 2H2O + 2CO2 C. 2 HCl + 2NaOH→ 2NaCl + 2H2O D. 2Mg + O2 → 2MgO 289.Which one is true statement? A. Upper parts of the heart used to pump blood to the body. B. Lower parts of the heart used to receive blood from different part of the body. C. The left side of the heart carries out oxygenated blood. D. The upper parts of the heart have muscular and thick walls. General Science Grade 8 290.Which of the following one is human respiratory disease? A. Sinusitis B. Constipation C. leukemia D. stroke 291.If a given mammal has a dental formula of 3/2, 2/2, 4/3, 3/3, how many total premolar teeth does the animal has? A. 36 B. 44 C. 46 D. 14 292.Which one is the correct pathway of oxygenated blood flow? E. body→ vena cava →right atrium→ right ventricle →pulmonary artery →lung F. Body → right atrium→ right ventricle →pulmonary artery→ lung G. lung → right atrium→ right ventricle →pulmonary artery→ vena cava →body H. lung → pulmonary vein→ left atrium→ left ventricle →aorta→ body tissue 293.The electron number of an ion (19K+1) is ________________ A. 19 B. 20 C. 18 D. 39 294.The central part of an atom is ___________________ A. electron B. atomic shell C. nucleus D. energy level 295.One of the following is not molecules of elements__________________ A. Helium B. Carbon C. water D. oxygen 296.All noble gases have _______________ electron in their outer most shell except helium A. 2 B. 8 C.4 D. 1 297.One of the following is not molecules of compounds. A. water B. ozone C. carbon dioxide D. sulfur dioxide 298.Which of the following is mono atomic molecule? A. helium B. oxygen C. sulfur D. chlorine 299.Which of the following element is both poly and diatomic? A. oxygen B. nitrogen C. hydrogen D. phosphorus 300.Who proposed the discrete theory? A. Aristotle B. Democritus C Dalton D Lavoisier 301.Which of the following is a poly atomic molecule? A. Fluorine B. Sulphur C. Chlorine D. Iodine 302.Which property of substance is N0T measurable? A. density B. Melting point C. Conductivity D. Odorous 303.Which of the following is NOT the property of base? A. A base change the color of indicators B. A base has a bitter taste C. A base release hydrogen ion in water D. A base neutralizes acidic solution General Science Grade 8 304.Which one is the only positively charged polyatomic ion? A. Hydroxide ion B. Ammonium ion C. Carbonate ion D. Sulphate ion 305.Which of the following subatomic particle revolve around the nucleus of atom? A. proton B. electron C. neutron D. nucleus 306.If an atom has 17 proton and 16 neutron, then what is atomic number? A. 16 B. 33 C. 1 D. 17 307. If an atom has 12 proton and 26 mass number, then what is neutron? A. 12 B. 26 C. 38 D. 14 308. Which of the following is a poly atomic molecule? A. Fluorine B. Sulphur C. Chlorine D. Iodine 309.The salt “KI” derived from _______ A. NaOH and HI C. KOH and HI B. KOH (and) H2So3 D. KO4 and HCL 310.Which of the following organic compound is used to preserve vegetable or pickling? A. Ethannol B. Acetic acid C. formalin D. Ethuyne 311.What is the formula of saturated hydrocarbon with 9 carbon atom? A. C9H18 B. C9H16 C. C9H20 D. C9H19 312.Which of the following organic compound found in all alcoholic beverage? A. methanol B. Ethanol C. butanol D. octanol 313.Which of the following salt is used in making gun powder? A. CaCO3 B. KNO3 C. NaHCO3 D. CaSO4 314.Which one is the molecular formula of pronene? A. CH6 B. C3H8 C. C3H4 D. C3H10 315.Which of the following is acidic oxide? A. S02 B. Na2O C. MgO D. K2O 316.Which of the following statement is true about oxides? A. All oxides are binary compounds B. All metallic oxides are basic oxides C. All non – metallic oxides are acidic oxides D. All binary compounds are oxides 317.What is the name of base which is used for neutralizing Acidic soil? A. KOH B. NaOH C. Ca(OH)2 D. NHOH 318.Which of the following base is used as stomach anti acid? A. CaCOH)2 B. Mg(OH)2 C. HCl D. KOH 319.An organic compound which is used to produce oxyacetylene flame is:- A. Ethane B. Ethyne C. Propene D. Decane General Science Grade 8 320.Which of the following salt is used as baking powder? A. Kno3 B. NaHCO3 C. (NH4)2So4 D. Nacl 321.What is anhydride of H2CO3? A. Co B. CO2 C. CO D. C2O 322.The compound which is different by the CH2 group is A. Hydrocarbon B. radical C. Homolguous D. radicand 323.A compound that used as source of energy for cooking, heating and generating electricity is A. methane B. Ethane C. acetylene D. propene 324.Which of the following is false about Alkyne A. The bond between carbon – carbon is triple bond B. The general formula of Alkyne is CnH2n– 2 C. It is saturated Hydrocarbon D. It is un saturated hydrocarbon 325.Among the following is binary slat:- A. Al2S3 B. AlPo4 C. KCN D. Al2(CO3)3 326.The general formula of Alkane is:- A. CnH2n B. CnH2n+2 C. CnH2n+l D. CnH2n – 2 327.Which of the following is acidic oxide? A. WO3 B. Mgo C. Na2O D. Cao 328.Which of the following hydrocarbon is carbon to carbon double bond? A. C2H6 B.C8H14 C. C32H64 D. C4H10 329.Which of the following is inorganic compound? A) CO B. CO2 C. H2O D. all 330.Which of the following is the general formula of alkenes? A. CnH2n–2 B. CnH2 n C. CnH2n+1 D. CnH2n+2 331.What is the chemical formula of alkene that contains 7 carbon atoms? A. C7H12 B. C7H14 C. C7H16 D. C7H18 332.Which of the following groups of oxides are classified under metallic oxide? A. N2O3, P2O3, SO3 C. CO2, SO2, NO2 B. MgO, CaO, Al2O3 D. CO, NO, P2O3 333.Which of the following acid is found in ant and bee? A. acetic acid B. Formic acid C. citric acid D. none 334.Which of the following is not organic compound? A. Fat B. Carbon monoxide C. Sugar D. Urea 335.Which of the following is used for preservation of biological species? A. Formalin B. Butane C. Ethanol D. All General Science Grade 8 336.Which of the following indicator forms colorless when added to acids? A. RED litmus B. phenolphthalein C. Methyl orange D. all 337.What color is formed when methyl orange is added to acidic A. Yellow B. Red C. Orange D. Colorless 338.Which of the following is the general formula of Alkyene? A. CnH2n B. CnH2n+2 C. CnH2n_2 D. CnH2n_1 339.Which hydrocarbon is found in biogas? A. Ethene B. Methane C. Octane D. Propane 340.The formula of pentene is A. C5H14 B. C5H12 C. C5H8 D. C5H10 341.Hydrocarbon with a formula of C7H12 is A. Alkane B. Alkyne C. Alkene D. Alkali 342.Which of the following pair show acidic oxide? A. CO2 and Li2O C. CO2 and CO B. CO and H2O D. CO2 and P2O5 343.If you burn magnesium ribbon in air, then what will be the product? A. Magnesium oxide C. Magnesium sulphide B. Magnesium hydroxide D. Magnesium peroxide 344.Acid can be prepared in the laboratory by the reaction of------- A. Acidic oxide with water C. Metal with non metal B. basic oxide with water D. Metalic oxide with water 345.Which of the following compound used for food flavoring? A. Formalin B. Vinegar C. Ethane D. Methane 346.Which of the following is stomach anti acid? A. HCl B. Mg(OH)2 C. Na(OH) D. Ca(OH)2 347.Which one of the following is binary compounds? A. NH4Cl B. CaCO3 C. KNO3 D. H2O2 348.Which of the following is NOT the property of base? A. A base change the color of indicators B. A base has a bitter taste C. A base release hydrogen ion in water D. A base neutralizes acidic solution 349.What is the formula of Ethyene? A. C2H3 B. C2H2 C. C3H8 D. C2H4 350.That molecular formula of saturated hydrocarbon with 9 carbon atom is A. C9H18 B. C9H16 C. C9H20 D. C9H22 General Science Grade 8 351.Which of the following element is found in all organic compound? A. Nitrogen B. oxygen C. Carbon D. Sulpur 352.The characteristic property of an acid is due to the presence A. Hydride ions B. hydroxide ion C. hydrogen ion D. nitrogen 353.The name of C10H20 is A. Decane B. Decene C. Decyne D. Octane 354.What gas is produce when active metals react with acid? A. hydrogen gas B. Carbon dioxide C. Sulphur D. Nitrogen dioxide 355.Which one is not oxide? A. ZnO B. H2O C. CS2 D. CO2 356.All of the following are hydrocarbons except A. Alkane B. Alkene C. Alcohol D. Alkyne 357.Which oxide react with water to produce a compound that changes the color of blue litmus to red? A. CO B. CO2 C. K2O D. H2O 358.Which statement is true about the volume of the body? A. The space occupied by the body. B. The time rate of change of displacement. C. The amount of mass in a unit volume. D. The space bounded by a certain line. 359.Which one of the following is derived physical quantity? A. speed B. temperature C. current D. mass 360.20m2 is equal to _________________ A. 2 x 106mm2 B. 2 x 10-6 mm2 C. 2 x 10-7 mm2 D. 2 x 107 mm2 361.The SI units of density is: 𝑘𝑔 𝑔 𝑚 𝑚 A. 𝑚3 B. 𝑐𝑚3 C. 𝑠 D. 𝑠2 362. Which one of the following is correct about mass? A. It describes the amount of matter contained in a body. B. It is derived physical quantity. C. It describe the distance between two point D. It describe the duration between the beginning and the end of an event 363. What is the name of the prefix for 10-6 A. Mega B. Kilo C. Micro D. Nano 364. Which one of the following derived unit? A. N B. Kg C. K D. Meter 365.Which one of the following traditional measuring device of length? A. Span B. Cubit C. Stride D. All General Science Grade 8 366.Which one of the following is equal to 109? A. Mega B. Tera C. Nano D. Micro 367.Which one is NOT equal to 200m? A. 2000dm B. 200mm C. 0.2Km D. 20,000cm 368. Which of the following fundamental physical quantity is NOT correctly related with its basic unit? A. Mass (m) kilogram (kg) B. Temperature (T) ampere (A) C. time (t) second(s) D. amount of substance (M) mole (mol) 369.Which one is a scientific way of measurement instrument? A. Beam balance B. Cubit C. stride D. span 370.Which of the following traditional unit is not reliable? A. Stride B. span C. cubits D. all 371. 1 ½ day can be expressed in second as: A. 86,400 B. 129,600 C. 43,200 D. 17.4 372.2 hr + 20min + 60 sec are equal to ______________ minutes. A) 120min B. 141 min C. 150 min D. 161 min 373. How many centimeters are there in 9.3m? A) 900cm B. 930cm C. 0.93cm D. 0.093cm 374.Tesnim is 12 years old. How many months are there in this year? A. 52 months B. 144 months C. 24 months D. 150 months 375.The number of seconds in one month is equal to: A. 2,592,000 B. 720,000 C. 3600 D. 2,700,000 376.Converting 3.2 min in seconds gives A. 192 seconds B. 640 seconds C. 360 seconds D. 720 second 377. What is the temperature scale reading in the Fahrenheit scale when the reading is 60 ˚C? A. 134 ˚F B. 136 ˚F C. 138 ˚F D. 140 ˚F 378.At what temperatures do the Fahrenheit and Celsius scale have the same value? A. 40C. 400F B. -40 C. 400F C. -40 C. -400F D. 40 C. -400F 379.Convert 273 K in to F. A. 00 F B. 320F C. 1000F D. 2120F 380.Which one of the following sets of temperatures are equivalent? A. 500F, 100C. 283 K C. 860F, 300C. 187K B. 680F, 200C ,341 K D.1130F 450C 228 K General Science Grade 8 0 381.The temperature of a body is 20 c. What is the temperature of the body in Kelvin scale? A) 52k B) 36k C) 293k D) 6K 382. 370c is equivalent to the Kelvin reading of: A) 310k B)236k C) 373k D) 225k 383._______ is used for measuring Temperature. A. Thermometer B. Ammeter C. Anemometer D. Ammeter 384. What is the temperature scale reading in the Fahrenheit scale when the reading is 600C? A. 1340F B. 1360F C. 1380F D. 1400F 385. The reading of the thermometer is 860F. convert this reading in Celsius scale reading A. 150C B. 300C C. 400C D. 860C 386. What is 50F in Kelvin? A. 15K B. 258 K C. 273 K D. 288 K 387.Which parts of an atom is negatively charged? A. Proton B. electron C. neutron D. B and C 388.149°F is equal to __________ A. 65°C B.335K C.54°C D.400K 389. The two human teeth types that are used for bitting are A. molars and premolars C. incisors and canines B. Incisors and premolars D. canines and premolars 390. Which of the following digestion activities takes place in the mouth? A. Digestion of proteins to aminoacids B. Production of saliva by salivary glands C. Absorption of carbonhydrates as glucose D. production of hydrochloric acid by gastric glands 391. In which structure of the lungs does exchange of gases with the blood take place? A. Alveoli B. bronchi C. bronchioles D. trachea 392. Which of the following breathing structures is located more nearer to the lungs? A. Glottis B. bronchus C. larynx D. pharynx 393. Which of the following affect the rate of breathing? A. altitude B. Smoking C. Anxiety D. All 394. Which of the following is not a constituent of cigarette smoke? A. oxygen B. Nicotine C. carbonmonoxide D. Tar 395. Bile is a greenish is in yellow alkaline liquid that is produced in the A. stomach B. liver C. pancreas D. duodenum 396. The entrance of food in to trachea is prevented by A. glottis B. pharynx C. epiglottis D. larynx General Science Grade 8 397. Which one of the following is the first stage with in the alimentary canal of human? A. ingestion B. digestion C. absorption D. egestion 398. The building blocks of proteins are A. monosaccharides B. aminoacids C. fatty acids D. glycerol 399. Getting rid of the waste products produced by the cells is known as A. egestion B. respiration C. excretion D. ingestion 400.Which one of the following is very strong and non living part of a tooth? A. Dentine B. pulp cavity C. enamel D. cement 401. Which one of the following body fluid is not a source of HIV/AIDS infection? A. Semen B. Blood C. Breast milk D. Tear 402.One of the following is sexually transmitted disease. A. Typhoid C. Tapeworm B. Gonorrhea D. Acute watery diarrhea 403.All are abiotic factors of the environment except…………… A. Rock B. Scavengers C. Water D. Air 404.The word edaphic factor refers to ……………and its properties. A. Soil B. Water C.Air D. Animals 405.The simple and direct feeding relationship of organisms is represented by A. Food chain C. Food web B. Conservation of energy D. trophic level 406.The group of bacteria known as nitrobacter plays important role in…………..cycle. A. Nitrogen B. Water C. Carbon D. A and B 407.One of the following can be a cause for increase of temperature around the world. A. Greenhouse effect C. Deforestation B. Depletion of ozone layer D. All of the above 408.In adult human the full set of teeth contain 8 incisors, 4canine, 8 premolar and 12 molars. The correct dental formula of the person is A. I 8/8 C 4/4 P 8/8 M 12/12 B. I 2/2 C 1/1 P 2/2 M 3/3 C. I 4/4 C 2/2 P 4/4 M 6/6 D. I 1/1 C 1/1 P 1/1 M 2/2 409. Which one of the following is not part of milk set of teeth? A. Premolar B. Canine C. Molar D. Incisor 410. Which one of the following enzyme is active at low pH such as found in stomach? A. Salivary amylase B. Pepsin C. ptyalin D. Protease General Science Grade 8 411. The function of hydrochloric acid present in gastric juice is A. To emulsify milk fat B. To kill some bacteria and another microorganisms C. To provide acidic medium for the action of trypsin D. B and C 412. Which one of the following blood vesselscarries oxygenated blood? A. Pulmonary artery C. pulmonary vein B. Anterior venacava D. Inferior venacava 413. Among the following components of blood which one is important for blood clotting A. Lymphocytes B. Erythrocytes C. platelet D. Plasma 414. Which blood vessel carries blood away from heart? A. Arteries B. Capillaries C. Veins D. Venues 415. If a substance is injected into the right ventricle which one of the following parts would the substance reach last? A. Lungs B. Right auricle C. left ventricle D. left auricle 416. Which one of the following cells will increase in number if the body is invaded by germ? A. Erythrocytes B. Leukocytes C. Thrombocytes D. plasma 417. Elastic, thick wall and carries blood away from the heart. A. Veins B. Arteries C. Capillaries D. Venues 418. The largest artery of our body A. Subclavian artery B. Aorta C. Coronary artery D. vena cava 419.One of the following accessory structure of digestive system produce bile to change fat in to fat droplets. A) Pancreases B. Gall bladder C. Liver D. Salivary gland 420. Dentin found in crown of our teeth is covered by A) Enamel B. Gum C. Cement D. Pulp cavity 421. One of the following is sexually transmitted disease. A) Syphilis B. charicroid C. Gonorrhea D. All 422. One of the following is true about HIV/AIDS A) It is only known about 30 years. B) It is fatal for almost every one who is infected C) It attack immune system D) All of the above 423. The causative agent of syphilis is A) Nisserria gonorrhea C. Tryponema palladium B) Mycobacterium tuberclae D. Mycobacterium bocis General Science Grade 8 424.Which of the following chemical causes the depletion of ozone layer in the atmosphere? A. Chlorofluoro carbons C. Carbonmonoxide B. Carbondioxide D. Sulphur dioxide 425.Which air pollutants can lead to global warming? A. Carbon dioxide and carbon monoxide B. Methane and nitrogen oxides C. Methane and sulphur dioxide D. carbon dioxide and methane 426.How is global warming caused? It is caused due to: A. deforestation and burning of trees B. replanting forests with native trees C. increased rate of photosynthesis D. decrease in the amount of carbondioxide 427.Planting and growing trees is important A. reduce soil fertility B. Increase soil erosion C. increases air pollution D. reduce global warming 428.Which of the following processes removes carbondioxide from the air? A. Denitrification B. Fermentation C. Respiration D. Photosynthesis 429.What is the role of nitrifying bacteria in the nitrogen cycle? A. Produce nitrates for the use by plants B. build free nitrogen in their bodies C. release free nitrogen to atmosphere D. decompose dead bodies of plants and animals 430.Which of the following is true of the pyramid of energy? A. The biomass of carnivores is greater than herbivores B. Organisms at higher tropic levels contain more energy than organisms at lower tropic levels C. Energy is lost in a food chain at various tropic levels D. Primary consumers are large in number than producers 431.plants absorb nitrogen from the soil in the form of: A. ammonium ions C. Atmospheric nitrogen B. nitrate ion D. Nitrite ion General Science