Grade 7 Science Exam 2025 Semester 1 PDF

**Grade 7 Science Exam** **Your Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** - **Answer All questions on the answer sheet provided.** - **Shade in your selection clearly, if you make a mistake ensure you rub your mistake out and clearly mark the correct answer.**...

**Grade 7 Science Exam** **Your Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** - **Answer All questions on the answer sheet provided.** - **Shade in your selection clearly, if you make a mistake ensure you rub your mistake out and clearly mark the correct answer.** 1. **What is the charge of a neutron?** a. Negative b. It varies c. No charge d. Positive 2. **What is the number of electrons in the first shell of an atom?** e. 8 f. 2 g. 32 h. 18 3. **What is the relationship between the number of protons and electrons in an atom?** i. There is no fixed relationship between the number of protons and electrons j. The number of protons is equal to the number of electrons k. The number of protons is always greater than the number of electrons l. The number of electrons is always greater than the number of protons 4. **What is the term for the arrangement of electrons in energy levels around the nucleus of an atom?** m. Shells n. Atomic mass o. Energy levels p. Electron configuration 5. **What is the atomic number of an atom equal to?** q. The number of protons and neutrons in the nucleus r. The number of electrons in the outermost shell s. The total number of electrons in the atom t. The number of protons in the nucleus 6. **What is the atomic mass of an atom equal to?** u. The number of protons in the nucleus v. The total number of electrons in the atom w. The number of protons and neutrons in the nucleus x. The number of electrons in the outermost shell 7. **What is the maximum number of electrons that can occupy the second shell?** y. 12 z. 2 a. 8 b. 10 8. **Calcium has an atomic number of 20. What is the electronic configuration of the element Calcium (Ca)?** c. 2,8,12 d. 2,8,10 e. 2,8,6,2 f. 2,6,7,5 9. **What do the circles represent in a Dot and Cross diagram?** g. Shells h. Molecules i. Electrons j. Nucleus 10. **Chlorine has an atomic number of 17. What is the electronic configuration of the element Chlorine (Cl)?** k. 2,8,7 l. 2,7,8 m. 2,8,6 n. 2,8,5 11. **What happens to the particles in a liquid as they are heated?** o. They change into a gas instantly p. They move faster and escape from the surface of the liquid q. They turn into a solid r. They move slower and come closer together 12. **What is an element?** s. A compound made up of two or more different types of atoms t. A substance made up of only one type of element u. A molecule formed when two or more atoms chemically combine v. A pure substance that has mass and volume 13. **What is the term for the fundamental building block of all materials?** w. Element x. Compound y. Atom z. Molecule 14. **What happens to the particles in a gas as it is cooled?** a. They move faster and escape from the surface of the gas b. They move slower and come closer together c. They turn into a solid d. They change into a liquid instantly 15. **What is the term for a pure substance that is made up of two or more different types of atoms chemically combined?** e. Element f. Molecule g. Matter h. Compound 16. **What occurs when the particles in a gas are cooled?** i. They move slower and come together j. They remain at the same speed and distance k. They disappear and become invisible l. They move faster and spread out 17. **What is the fundamental building block of all materials?** m. Atom n. Molecule o. Proton p. Element 18. **What is the term for a pure substance that is made up of two or more different types of atoms chemically combined?** q. Element r. Mixture s. Molecule t. Compound 19. **What is matter?** u. Anything that has volume but no mass v. Any substance that has mass and volume w. Any substance that has neither mass nor volume x. Anything that has mass but not volume 20. **What is an atom?** a. A small particle that makes up matter b. A type of chemical reaction c. A molecule of a compound d. A state of matter 21. **Which of the following is an example of an element?** a. Water (H₂O) b. Sodium chloride (NaCl) c. Oxygen (O₂) d. Carbon dioxide (CO₂) 22. **Which part of an atom has a positive charge?** a. Neutron b. Electron c. Proton d. Nucleus 23. **What is the atomic number of an element?** a. The number of neutrons in the atom b. The number of protons in the nucleus of an atom c. The mass of the atom d. The number of electrons in an atom 24. **What does the number of protons in an atom determine?** a. The color of the element b. The element\'s identity c. The size of the atom d. The atom\'s state of matter 25. **Which of the following particles is found outside the nucleus of an atom?** a. Proton b. Neutron c. Electron d. Nucleus 26. **Which of the following elements is a noble gas?** a. Oxygen (O) b. Nitrogen (N) c. Helium (He) d. Carbon (C) 27. **What is the atomic symbol for Sodium?** a. Na b. S c. So d. NaO 28. **Which particle is neutral and has no charge?** a. Proton b. Neutron c. Electron d. Ion 29. **What is a molecule?** a. A single atom b. A type of ion c. Two or more atoms bonded together d. A proton and neutron combined 30. **Which of the following is a compound?** a. Nitrogen (N₂) b. Carbon (C) c. Water (H₂O) d. Oxygen (O₂) 31. **What is the simplest form of a substance that cannot be broken down chemically?** a. Molecule b. Element c. Compound d. Mixture 32. **How many atoms are in a molecule of carbon dioxide (CO₂)?** a. One b. Two c. Three d. Four 33. **Which of the following is true about a compound?** a. It consists of only one type of atom b. It consists of two or more different types of atoms chemically bonded c. It is a physical mixture d. It is always in a solid state 34. **Which of the following compounds contains two different elements?** a. O₂ b. NaCl c. N₂ d. He 35. **What is the difference between a molecule and a compound?** a. A molecule can only have one type of element, but a compound must have two or more types of elements. b. A molecule contains only ions, while a compound contains only atoms. c. A molecule is made only of atoms from the same element, while a compound has atoms from different elements. d. A molecule cannot be broken down into simpler substances, but a compound can be. 36. **Which of the following is true about elements in the same group on the periodic table?** a. They have the same number of protons b. They have similar chemical properties c. They are all metals d. They have the same atomic mass 37. **Which of the following elements is a metalloid?** a. Boron (B) b. Oxygen (O) c. Sodium (Na) d. Magnesium (Mg) 38. **Which of the following is an example of a molecule made up of two atoms of the same element?** a. Nitrogen (N₂). b. Carbon dioxide (CO₂) c. Water (H₂O) d. Methane (CH₄) 39. **What is a chemical reaction?** y. A change in the physical state of matter z. A process that breaks and forms bonds between atoms a. A change in the temperature of a substance b. A change in the physical appearance of a substance 40. **Which is the main difference between mixtures and compounds?** a. Mixtures can only be separated by chemical means b. Compounds contain only one type of element c. Mixtures are not chemically combined, while compounds are d. Compounds are always solids, while mixtures are always liquids 41. **What is the term for the smallest particle that all matter is made of?** c. Molecule d. Element e. Atom f. Compound 42. **How many electrons can the first shell of an atom hold?** g. 4 h. 2 i. 6 j. 8 43. **What is formed when two or more different types of atoms are bonded together?** k. Atom l. Molecule m. Compound n. Element 44. **What is the term for the arrangement of atoms in an element?** o. Molecule p. Atom q. Element r. Compound 45. **What is the purpose of the atomic number of an element?** s. To determine the number of protons in the nucleus t. To identify the element\'s position in the periodic table u. To identify the element\'s symbol v. To determine the element\'s atomic mass 46. **What is the term for a group of atoms bonded together?** w. Molecule x. Atom y. Element z. Compound 47. **What is the location of protons and neutrons in an atom?** a. In the molecule b. In the nucleus c. In the electron shells d. Outside the atom 48. **What is the maximum electron capacity of the 2nd shell?** e. 2 f. 32 g. 18 h. 8 49. **What is the charge of an electron?** i. Positive j. Negative k. Neutral l. Variable 50. **What is the term for a group of atoms bonded together?** m. Atom n. Element o. Molecule p. Compound 51. **What determines the identity of an element?** q. Number of electron shells r. Number of electrons s. Number of neutrons t. Number of protons 52. **What is the primary process by which sediments are converted into sedimentary rocks?** u. Metamorphism v. Melting w. Cooling and Solidification x. Compaction and Cementation 53. **Which of the following statements best describes the relationship between sedimentary rocks and metamorphic rocks?** a. Sedimentary rocks can undergo heat and pressure to become metamorphic rocks. b. Sedimentary rocks are always older than metamorphic rocks. c. Sedimentary rocks are formed directly from magma. d. Metamorphic rocks can easily transform into igneous rocks. 54. **Which of the following statements about the formation of sedimentary rocks is not [correct]?** a. The rock cools slowly underground. b. Sediments build up in layers c. All igneous rocks cool slowly d. Shells and hard parts of marine organisms build up on the bottom of the ocean 55. **Rocks that have been formed from other rocks due to intense heat and pressure are called:** a. Metamorphic Rocks b. Igneous Rocks c. Mineralized Rocks d. Sedimentary Rock 56. **Which of the following is not considered an agent of change in the rock cycle?** a. Water b. Time c. Gravity d. Heat 57. **What role does chemical reaction play in the rock cycle?** a. Chemical reactions are crucial for cementation but not for weathering. b. Chemical reactions are essential in the weathering of rocks and the formation of sediments. c. Chemical reactions only occur during the melting process. d. Chemical reactions solely facilitate the formation of igneous rocks. 58. **What happens to metamorphic rocks when subjected to extreme heat?** a. They remain unchanged. b. They become sedimentary rocks. c. They undergo compaction. d. They can melt to form magma. 59. **What type of rock is formed by the cooling and solidification of lava?** a. Extrusive igneous rock b. Metamorphic rock c. Sedimentary rock d. Intrusive igneous rock 60. **What geological process involves breaking down rocks into smaller fragments?** a. Metamorphism b. Weathering and erosion c. Cooling and solidification d. Compaction 61. **Which of the following describes how igneous rocks are formed?** a. By the deposition of organic material b. From the cooling and solidification of magma or lava c. Through the accumulation of sediments d. By the transformation of other rock types 62. **What influences the texture of igneous rocks?** a. The pressure exerted on the rocks b. The rate of cooling of magma or lava c. The minerals present in the rock d. The amount of sediment in the area 63. **Sedimentary rocks are typically formed through which process?** y. The crystallization of minerals z. Melting and cooling a. Accumulation and cementation of sediments b. Heat and pressure 64. **Which statement accurately represents metamorphic rocks?** c. Their formation requires only low temperature and pressure. d. They are formed exclusively from igneous rocks. e. They are formed by the rapid cooling of magma. f. They can originate from any pre-existing rock type. 65. **What is a characteristic feature of metamorphic rocks?** g. Foliation texture h. Crystallized minerals from cooling i. Fine-grained texture j. Presence of fossils 66. **What was likely the first type of rock to form in the Earth's crust was most likely:\ ** a. Sedimentary b. Metamorphic c. Igneous d. Fossil 67. **What happens to rocks if they are buried deep in the Earth at high temperatures and pressures?** a. They break down into smaller particles b. They form new minerals and metamorphic rocks c. They always melt and form magma d. They transform into sedimentary rocks 68. **What is the initial stage of a star\'s life cycle?** k. Red Giant l. Main sequence star m. Protostar n. White Dwarf 69. **During which stage does a star, like our Sun, spend most of its life?** o. White Dwarf p. Main sequence star q. Red Giant r. Supernova 70. **What happens to a star once it exhausts its hydrogen fuel?** s. It becomes a black hole t. It becomes a red giant u. It turns into a white dwarf v. It explodes as a supernova 71. **What is a characteristic of a white dwarf star?** w. It emits no light x. It has a much larger size than the original star y. It is the hottest phase of a star z. It is formed during a supernova 72. **What defines a black hole in terms of gravity?** a. It has less gravitational pull than a neutron star b. It emits radiation detectable from Earth c. Light cannot escape its gravitational pull d. It is larger than a supernova 73. **What is the final stage of a massive star\'s life cycle after the supernova?** e. Black Hole f. Black Dwarf g. Red Supergiant h. White Dwarf 74. **What happens to the outer layers of a star when it becomes a red giant?** i. They disappear completely j. They expand massively and become cooler k. They ignite into a supernova l. They contract tightly 75. **What is created during a supernova event?** m. Atoms found in the universe n. New stars only o. A black dwarf p. Planets from the debris 76. **The variable that you measure is the --** q. Controlled Variable r. Independent Variable s. Dependent Variable t. Repeated Trial 77. **How many independent variables can be tested in a controlled experiment?** u. two v. as many as possible w. three x. one 78. **What is a prediction?** y. A prediction is the wrong answer to an experiment. z. A prediction is the right answer to an experiment. a. A prediction is an educated guess. b. A completed scientific conclusion 79. **An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, same amount of sunlight, and the same amount of liquid. In this investigation, what is the independent variable.** a. Different liquids b. Amount of sunlight c. Type of plant d. Plant growth 80. **Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the dependent variable.** a. Distance traveled by the ball b. Mass of the ball c. Height of the ramp d. The height of the ramp 81. **A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. What is the control variable?** a. The height the ball bounces b. The ball used c. Height of the ball being dropped d. The weather 82. **The measurable factor in an experiment is known as the:** a. Constant b. Independent Variable c. Control d. Dependent Variable 83. **An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What should be kept constant?** a. type of plant only b. only the amount of sunlight c. type of plant, flower pot, soil, and amount of sunlight d. water, apple juice, milk 84. **In an experiment to determine if temperature affects the solubility of sugar in water, what is the independent variable.** a. The type of sugar used. b. The amount of sugar. c. The solubility of the sugar. d. The temperature of the water. 85. **If you are conducting an experiment to see if the type of fertilizer affects plant growth, what would the dependent variable be?** a. The type of fertilizer. b. The color of the plants. c. The growth of the plants. **86. What is the primary role of an independent variable in an experiment?** A. It is the variable that is measured or observed. B. It is changed by the researcher to observe an effect. C. It is the outcome the researcher is investigating. D. It is held constant to control the experiment. **87. Which statement accurately describes a dependent variable?** A. It is always represented on the x-axis of a graph. B. It is the outcome measured in response to the independent variable. C. It is the factor changed to observe its effects. D. It is kept constant to avoid affecting results. **88. What is the significance of control variables in an experiment?** A. They ensure changes to the dependent variable are due to the independent variable. B. They are the main focus of the experiment. C. They confuse the relationship between independent and dependent variables. D. They should vary to test different outcomes. **89. In a well-designed experiment, how should independent variables be presented?** A. In the results section of a report. B. On the y-axis of a graph. C. On the x-axis of a graph. D. In the introduction section of a study. **90. Which statement about relationships between independent and dependent variables is true?** A. The dependent variable is expected to change in response to the independent variable. B. Changes in the dependent variable are unrelated to the independent variable. C. The independent variable is always a result of the dependent variable. D. Independent variables have no impact on the outcome of an experiment. **91. Which of the following describes control variables?** A. They are usually the primary interest of the experiment. B. They are kept constant to prevent them from influencing the dependent variable. C. They must be manipulated to gauge the effect on the independent variable. D. They often change during the course of the experiment. **92. What could happen if control variables are not properly managed in an experiment?** A. Results may be invalid due to extraneous influences. B. The dependent variable will be accurately measured. C. The independent variable will no longer be relevant. D. The cause-and-effect relationship will remain clear.