2023 WASSCE Integrated Science Past Paper PDF

## Answer all the questions. Each question is followed by four options lettered A to D. Find the correct option for each question and shade in pencil on your answer sheet, the answer space which bears the same letter as the option you have chosen. Give only one answer to each question. An exampl...

## Answer all the questions. Each question is followed by four options lettered A to D. Find the correct option for each question and shade in pencil on your answer sheet, the answer space which bears the same letter as the option you have chosen. Give only one answer to each question. An example is given below. Which of the following elements is a metal? A. Carbon B. Copper C. Helium D. Krypton The correct answer is Copper, which is lettered B, and therefore answer space B would be shaded. A B C D Think carefully before you shade the answer spaces; erase completely any answers you wish to change. Do all rough work on this question paper. Now answer the following questions. 1. Which of the following symptoms is an indication of fungal infection in vegetable nursery? A . Wilting of leaves B. Swellings on stems C. Rotting of roots D. Curling of leaves 2. Which of the following statements about an atom is correct? A. Protons out number electrons in a neutral atom B. The L-shell is closest to the nucleus C. Neutrons are found in the nucleus D. The atomic number is greater than the mass number 3. A machine is rated 5.30 W. In how many seconds will it do 212.0 J of work? A. 4.25 s B. 0.03 s C. 40.00 s D. 25.00 s 4. Carbon (IV) oxide is used to extinguish fires because it A. is fully oxidized. B. occurs naturally. C. is heavier than air. D. is a reducing agent. 5. A deep litter house measuring 45.0 m by 2.2 m is stocked at the rate of one bird per 0.25 m². Determine the number of birds stocked. A. 99 birds B. 396 birds C. 180 birds D. 1584 birds 6. An athlete weighs 750 N. Determine the athlete's mass. [ g = 10 m s⁻² ] A. 750 kg B. 375 kg C. 75 kg D. 7500 kg 7. A child has a fever, runny nose, red sore eyes and a rash inside the mouth. Which of the following diseases is the child likely to be suffering from? A. Whooping cough B. Measles C. Malaria D. Poliomyelitis 8. An example of a leafy vegetable is A. cabbage. B. bean. C. okro. D. carrot. 9. It is compulsory to wear goggles when handling substances that A. are poisonous. B. are corrosive. C. are highly flammable. D. emit sparks. 10. Excess amino acids in the body undergo the process of A. digestion. B. detoxification. C. deamination. D. osmosis. 11. An electric heater rated 60 W is connected to 240 V mains. Determine the current in its filament. A. 0.25 A B. 4.00 A C. 1440.00 A D. 60.00 A 12. Which of the following statements about sea breeze is/are correct? It I. occurs during the night. II. occurs during the day. III. blows toward the sea. A. II only B I and III only C. I only D. II and III only 13. Nutrient required in large quantities by leafy vegetables is A. nitrogen B. calcium. C. potassium. D. phosphorus. 14. The most effective way of controlling lice on fowls is by A. spraying. B. dipping. C. dusting. D. drenching. 15. In the vacuum flask, the vacuum between the polished walls minimizes heat transfer by I. conduction. II. radiation. III. convection. Which of the statements above are correct? A. I and III only B. II and III only C. I and II only D. I, II and III 16. Which of the following blood groups in humans does not contain antigen? A. A B. O C. B D. AB 17. Which of the following diseases is caused by vitamin deficiency? A. Hypertension B. Night blindness C. Tuberculosis D. Dysentery 18. The normal period for a human pregnancy is A. 52 weeks. B. 32 weeks. C. 28 weeks. D. 40 weeks. 19. Which of the following pairs of crops is grown for their roots? A. Cocoyam and onion B. Cassava and carrot C. Carrot and shallot D. Cocoyam and shallot 20. The presence of methane and carbon (IV) oxide in the air is the main cause of A. global warming. B. high and low tides. C. movement of air masses. D. thunder storm. 21. Sickle-cell anaemia is an example of A. sex-linkage. B. blood grouping. C. multiple alleles. D. partial dominance. 22. Which of the following statements are correct about semiconductors? They I. are used to make transistors. II. do not obey Ohm's law. III. are group (IV) elements. A. I, II and III B. I and III only C. I and II only D. II and III only 23. An example of a simple machine is A. sewing machine. B. bicycle. C. wheel and axle. D. car. 24. During digestion, rennin in the stomach A. provides acidic medium. B. emulsifies fat. C. coagulates milk protein. D. digests carbohydrates. 25. It is more advantageous to use solar energy than fossil fuel energy because A. fossil fuel energy is renewable. B. solar energy causes pollution. C. fossil fuel produces carbon (IV) oxide. D. solar energy is renewable. 26. The protoplasm of a cell is made up of A. cytoplasm and vacuole. B. nucleus and vacuole. C. cytoplasm and nucleus. D. mitochondria and cell membrane. 27. Which of the following deductions cannot be made from the symbol ¹²C? A. Mass number of the element B. Atomic number of the element C. Number of neutrons in the nucleus D. Relative atomic mass of the element 28. The size of the pupil of the eye is controlled by the A. iris. B. conjunctiva. C. cornea. D. lens. 29. Which of the following conditions could cause aflatoxin in groundnuts? A. Growing groundnut in poor soils B. Infection of groundnut plants by rosette disease C. Excessive treatment of harvested pods with chemicals D. Storage of pods of groundnut in humid conditions 30. Crop residue left on farms to conserve soil moisture are referred to as A. waste materials. B. stable mulch. C. hay. D. silage. 31. A body is more stable when its centre of gravity is A. at the centre. B. at its top. C. outside the body. D. close to the ground. 32. Ash from burnt plants is widely used in Ghana A. as bleaching powder. B. for preparing soap. C. for preparing salt. D. for improving soil texture. 33. The principle of flotation states that A. a floating body displaces its own weight of fluid in which it floats. B. a floating body experiences an upward force equal to its weight. C. a body immersed in a fluid does not displace the fluid. D. the upthrust on a floating body exceeds the body's weight. 34. Which of the following materials is magnetic? A. Platinum B. Brass C. Cobalt D. Aluminium 35. Biogas is produced from A. anaerobic fermentation of organic waste. B. aerobic fermentation of organic waste. C. aerobic fermentation of inorganic waste. D. anaerobic fermentation of inorganic waste. 36. The practice whereby shade is gradually removed from seedlings before transplanting is referred to as A. rogueing. B. hardening off. C. thinning. D. shading off. 37. The substance formed when carbon (IV) oxide is bubbled through lime water for a long time is A. Ca(HCO₃)₂ B. Na₂CO₃ C. NaHCO₃ D. CaCO₃ 38. One advantage of weaning lambs early is that the A. rams are not able to mate with the ewes easily. B. ewes come on heat within a short period. C. lambs become sexually matured easily. D. mothers grow faster. 39. The manufacture of plastics involves the scientific process known as A. crystallization. B. fermentation. C. vulcanization. D. polymerization. 40. A solution contains 5.3 g of sodium trioxocarbonate (IV) per dm³. Determine its molarity. [Na₂CO₃ = 106] A. 0.020 mol dm⁻³ B. 0.050 mol dm⁻³ C. 0.030 mol dm⁻³ D. 0.040 mol dm⁻³ 41. The energy output of a system is 40 J and the efficiency is 60%. Determine the energy input of the system. A. 66.7 J B. 24.0 J C. 75.4 J 42. Which of the following factors contribute to tidal waves experienced on the sea? The I. gravitational force of the sun and moon on the sea II. centripetal force created by the rotation of the earth around its axis III. occurrence of cyclones A. I and II only B. I and III only C. I, II and III D. II and III only 43. Myopia is an eye defect that makes a sufferer to A. feel dizzy continuously. B. view far away objects but not near objects. C. view normally. D. view near objects but not far away objects. 44. A quantity of NaCl was dissolved in 100 cm³ of solution to obtain 0.50 moldm⁻³ NaCl solution. Determine the mass of NaCl used. [ NaCl = 58.5] A. 2.54 g B. 25.40 g C. 2.93 g D. 29.35 g, 45. The weather on earth is determined by changes in temperature, pressure and winds that take place in the A. thermosphere. B. stratosphere. C. mesophere. D. troposphere. 46. A farmer planted 2400 cuttings of cassava of which 85% survived grasscutter invasion. Determine the number of cassava plants that was destroyed. A. 360 B. 155 C. 150 D. 204, 47. Which of the following statements about wind are correct? I. It is an air mass II. It moves from an area of high pressure to an area of low pressure. III. It moves from an area of low pressure to an area of high pressure A. I, II and III B. II and III only C. I and III only D. I and II only 48. Given that the Avogadro's constant is 6.02 x 10²³, determine the number of atoms in 0.001 mol of aluminium metal. A. 6.02 x 10²⁶ B. 6.02 x 10²⁰ C. 3.01 x 10²⁰ D. 12.30 x 10²³ 49. Which of the following combinations of elements do all carbohydrates contain? A. Sulphur, carbon, hydrogen and oxygen B. Carbon, phosphorus, oxygen and hydrogen C. Carbon, hydrogen and nitrogen D. Carbon, hydrogen and oxygen 50. Setts are planting materials used for the cultivation of A. ginger. B. pineapple. C. radish. D. yam. END OF PAPER