WASSCE 2023 Integrated Science Past Questions and Answers
The WASSCE 2023 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
2. Which of the following statements about an atoms 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
Answer: C. Neutrons are found in the nucleus
Answer: C. Protons and neutrons are found in the nucleus; electrons move around it.
Answer: C. Protons and neutrons are found in the nucleus; electrons move around it.
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. 40.0 s
- D. 25.0 s
Answer: C. 40.0 s
Power Formula
Power = $\frac{Work Done}{Time}$
Time = $\frac{Work Done}{Power}$
Power = 5.30 W
Work done = 212.0 J
Time = $\frac{212}{5.3}$ s = 40.0 s
Power Formula
Power = $\frac{Work Done}{Time}$
Time = $\frac{Work Done}{Power}$
Power = 5.30 W
Work done = 212.0 J
Time = $\frac{212}{5.3}$ s = 40.0 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.
Answer: C. is heavier than air.
Answer: C. Carbon(IV) oxide is heavier than air and does not support burning, so it blankets the fire and cuts off oxygen.
Answer: C. Carbon(IV) oxide is heavier than air and does not support burning, so it blankets the fire and cuts off oxygen.
5. A deep litter house measuring 45.0 m by 2.2 m is stocked at the rate of one bird per 0.25 m$^{2}$.
Determine the number of birds stocked.
Determine the number of birds stocked.
- A. 99 birds
- B. 396 birds
- C. 180 birds
- D. 1584 birds
Answer: B. 396 birds
Number of birds = $\frac{Area of the deep litter}{Area per bird}$
Area of a rectangle = Length x Breadth
Area of the deep litter = 45 m x 2.2 m = 99 m$^{2}$
Area per bird = 0.25 m$^{2}$
Number of birds = $\frac{99 {m}^{2}}{0.25 {m}^{2}}$ = 396 birds
Number of birds = $\frac{Area of the deep litter}{Area per bird}$
Area of a rectangle = Length x Breadth
Area of the deep litter = 45 m x 2.2 m = 99 m$^{2}$
Area per bird = 0.25 m$^{2}$
Number of birds = $\frac{99 {m}^{2}}{0.25 {m}^{2}}$ = 396 birds
6. An athlete weighs 750 N. Determine the athlete's mass.
[g = 10 m s$^{-2}$]
[g = 10 m s$^{-2}$]
- A. 750 kg
- B. 375 kg
- C. 75 kg
- D. 7500 kg
Answer: C. 75 kg
Force/Weight Formula
Force/Weight (F) = Mass (m) x Acceleration due to gravity (g)
Mass = $\frac{Force/Weight (F)}{Acceleration due to gravity (g)}$
Force/Weight = 750 N
Acceleration due to gravity = 10 m s$^{-2}$
Mass = $\frac{750}{10}$ = 75 kg
Force/Weight Formula
Force/Weight (F) = Mass (m) x Acceleration due to gravity (g)
Mass = $\frac{Force/Weight (F)}{Acceleration due to gravity (g)}$
Force/Weight = 750 N
Acceleration due to gravity = 10 m s$^{-2}$
Mass = $\frac{750}{10}$ = 75 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
Answer and explanation: practise this paper on ePrep.
8. An example of a leafy vegetable is
- A. cabbage.
- B. bean.
- C. okro.
- D. carrot.
Answer and explanation: practise this paper on ePrep.
10. Excess amino acids in the body undergo the process of
- A. digestion.
- B. detoxification.
- C. deamination.
- D. osmosis.
Answer and explanation: practise this paper on ePrep.
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
Answer and explanation: practise this paper on ePrep.
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 towards the sea.
I. occurs during the night.
II. occurs during the day.
III. blows towards the sea.
- A. II only
- B. I and III only
- C. I only
- D. II and III only
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