WASSCE 2022 Integrated Science Past Questions and Answers
The WASSCE 2022 Integrated Science paper has 50 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. Which of the following statements about resistors connected in parallel is correct? The total resistance is
- A. the addition of the resistance.
- B. less than any one of them.
- C. equal to the greatest resistance.
- D. greater than any one of them.
Answer: B. less than any one of them.
Resistance in parallel Formula
$\frac{1}{{R}_{total}}$ = $\frac{1}{{R}_{1}}$ + $\frac{1}{{R}_{2}}$ + $\frac{1}{{R}_{3}}$ + ... $\frac{1}{{R}_{n}}$
When R$_{total}$ is calculated, the result is less than any one of the resistors.
Resistance in parallel Formula
$\frac{1}{{R}_{total}}$ = $\frac{1}{{R}_{1}}$ + $\frac{1}{{R}_{2}}$ + $\frac{1}{{R}_{3}}$ + ... $\frac{1}{{R}_{n}}$
When R$_{total}$ is calculated, the result is less than any one of the resistors.
2. The pigment in the skin responsible for skin colouration is
- A. xanthophyll.
- B. melanin.
- C. velamin.
- D. carotene
Answer: B. melanin.
Answer: B. Melanin is the dark pigment that gives human skin its colour.
Answer: B. Melanin is the dark pigment that gives human skin its colour.
3. Which of the following alloys contain copper?
I. Brass
II. Bronze
III. Duralumin
I. Brass
II. Bronze
III. Duralumin
- A. I and II only
- B. I and III only
- C. II and III only
- D. I, II and III
Answer: D. I, II and III
Brass → Copper and Zinc
Bronze → Copper and Tin
Duralumin is an alloy 95% aluminium, 4% copper, 0.5% manganese and 0.5% magnesium
Brass → Copper and Zinc
Bronze → Copper and Tin
Duralumin is an alloy 95% aluminium, 4% copper, 0.5% manganese and 0.5% magnesium
4. A body has a weight of 720 N. Calculate the mass of the body
[g = 10 ms$^{-2}$]
[g = 10 ms$^{-2}$]
- A. 7.2 kg
- B. 72 kg
- C. 720 kg
- D. 7200 kg
Answer: B. 72 kg
Force/Weight Formula
Force (F) = Mass (m) x Acceleration due to gravity (g)
Mass = $\frac{Force (F)}{Acceleration due to gravity (g)}$
Weight = 720 N
Acceleration due to gravity = 10 ms$^{-2}$
Mass = $\frac{720}{10}$ = 72 kg
Force/Weight Formula
Force (F) = Mass (m) x Acceleration due to gravity (g)
Mass = $\frac{Force (F)}{Acceleration due to gravity (g)}$
Weight = 720 N
Acceleration due to gravity = 10 ms$^{-2}$
Mass = $\frac{720}{10}$ = 72 kg
5. The burdizzo is purposely used for
- A. castrating farm animals.
- B. earthening-up.
- C. trimming crop plants.
- D. ear notching farm animals.
Answer: A. castrating farm animals.
Answer: A. A burdizzo crushes the spermatic cords without cutting the skin; it is used for bloodless castration.
Answer: A. A burdizzo crushes the spermatic cords without cutting the skin; it is used for bloodless castration.
6. An electrical component that is used to vary electric current is the
- A. ammeter.
- B. voltmeter.
- C. rheostat.
- D. amplifier.
Answer and explanation: practise this paper on ePrep.
7. An example of fungal disease of stored grains is
- A. damping off.
- B. soft rot.
- C. maize smut.
- D. mould.
Answer and explanation: practise this paper on ePrep.
8. Aluminium is used for making high tension cables because it is
I. light.
II. highly conducting.
III. brittle.
I. light.
II. highly conducting.
III. brittle.
- A. I and II only
- B. I and III only
- C. II and III only
- D. I, II and III
Answer and explanation: practise this paper on ePrep.
9. Which of the following forces is mainly reduced when a lubricant is applied to the moving parts of an engine?
- A. Gravitational force
- B. Magnetic force
- C. Frictional force
- D. Centripetal force
Answer and explanation: practise this paper on ePrep.
10. An instrument that could be used to measure the relative density of an acid is
- A. anemometer.
- B. hydrometer.
- C. barometer.
- D. hygrometer.
Answer and explanation: practise this paper on ePrep.
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