WASSCE 2025 Integrated Science Past Questions and Answers
The WASSCE 2025 Integrated Science paper has 45 objective and 6 theory questions. Here are sample objective questions with the correct answers and explanations. Sit the full paper with the real time limit on ePrep.
Sample questions with answers
1. A body has a mass of 70 kg. What is the force due to the earth acting on it? [g = 10 ms$^{-2}$]
- A. 3500 N
- B. 700 N
- C. 70 N
- D. 7000 N
Answer: B. 700 N
Answer: B. Weight = mg = 70 × 10 = 700 N.
Answer: B. Weight = mg = 70 × 10 = 700 N.
2. The main practice which is carried out in the nursery just before seedlings are transplanted is
- A. shading
- B. pricking-out
- C. hardening-off
- D. thinning
Answer: C. hardening-off
Answer: C. Hardening-off (gradually exposing seedlings to sun and less water) is done just before transplanting.
Answer: C. Hardening-off (gradually exposing seedlings to sun and less water) is done just before transplanting.
3. The diagram below is an electrical circuit showing two resistors connected in parallel. Determine the effective resistance of the combination.
- A. 1.20 Ω
- B. 0.83 Ω
- C. 5.00 Ω
- D. 6.00 Ω
Answer: A. 1.20 Ω
Answer: A. For two resistors in parallel, R = (2 × 3)/(2 + 3) = 6/5 = 1.20 Ω.
Answer: A. For two resistors in parallel, R = (2 × 3)/(2 + 3) = 6/5 = 1.20 Ω.
4. The following statements are examples of application of biotechnology in agriculture except
- A. improving upon colour and size of a flower
- B. development of pest-resistant crops
- C. crossing animals with desired characteristics
- D. introduction of foreign genes into livestock
Answer: C. crossing animals with desired characteristics
Answer: C. Crossing animals with desired traits is conventional breeding, not biotechnology (genetic modification).
Answer: C. Crossing animals with desired traits is conventional breeding, not biotechnology (genetic modification).
5. The movement of water into root hairs is by
- A. osmosis
- B. diffusion
- C. capillarity
- D. transpiration
Answer: A. osmosis
Answer: A. Water enters root hairs by osmosis, from the dilute soil water to the more concentrated cell sap.
Answer: A. Water enters root hairs by osmosis, from the dilute soil water to the more concentrated cell sap.
6. An example of soil micronutrient is
- A. nitrogen
- B. iron
- D. sulphur
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7. Which of the following systems in the human body is directly affected when carbon monoxide is inhaled?
- A. Respiratory
- B. Excretory
- C. Circulatory
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8. The part of the human brain that controls body temperature is
- A. medulla oblongata
- B. hypothalamus
- C. cortex
- D. cerebellum
Answer and explanation: practise this paper on ePrep.
9. How many moles of HCl is contained in 14.6 g of HCl? [H = 1, Cl = 35.5]
- A. 0.4 mol
- B. 0.04 mol
- C. 0.004 mol
- D. 4.0 mol
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10. In which of the following blood vessels is the pressure highest?
- A. Dorsal aorta
- B. Renal artery
- C. Hepatic artery
- D. Vena cava
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