BECE 2020 Integrated Science Past Questions and Answers
The BECE 2020 Integrated Science paper has 38 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 parts of the tooth is embedded in the jaw bone?
- A. Gum
- B. Neck
- C. Root
- D. Crown
Answer: C. Root
A tooth consists of three main parts, the crown, the root and the neck.
The crown is the part of tooth that shows above the gum.
The root is the part buried in the jawbone.
The point where the crown and the root meet is the neck of the tooth.
A tooth consists of three main parts, the crown, the root and the neck.
The crown is the part of tooth that shows above the gum.
The root is the part buried in the jawbone.
The point where the crown and the root meet is the neck of the tooth.
2. Which part of the human body stores sperms temporarily?
- A. Epididymis
- B. Scrotum
- C. Prostate gland
- D. Sperm duct
Answer: A. Epididymis
Testes, produces sperm and cells which produce male sex hormone,testosterone
Scrotum,contains the testes
Epididymis,temporarily stores sperms
Sperm duct(vas deferens), carries sperms from epididymis to penis during ejaculation
Prostate gland,secretes seminal fluid which contains the enzymes and nutrients to activate and nourish sperms. Fluid secretions combines with sperms from testes to form semen.
Testes, produces sperm and cells which produce male sex hormone,testosterone
Scrotum,contains the testes
Epididymis,temporarily stores sperms
Sperm duct(vas deferens), carries sperms from epididymis to penis during ejaculation
Prostate gland,secretes seminal fluid which contains the enzymes and nutrients to activate and nourish sperms. Fluid secretions combines with sperms from testes to form semen.
3. An advantage of soft water over hard water is that soft water
- A. is good for formation of strong bones in humans
- B. prevents heart diseases
- C. has a pleasant smell
- D. saves a lot of soap when used in washing
Answer: D. saves a lot of soap when used in washing
Water which does not lather readily with soap is called hard water
Hardness of water is caused by the presence of dissolved salts of calcium ion, magnesium ion or iron(III) ion in water
Water which lather readily with soap is called soft water.
Soft water does not contain calcium ion,magnesium ion or iron(III) ion
Advantages of hard water
* Has pleasant taste so used in brewery industry
* Hard water provides calcium, which is essential for bones, teeth, and shells formation in animals
* Hard water provides Ca$^{2+}$ ions which help in blood clotting in animals
* Hard water provides Ca$^{2+}$ ions which are used by plants to manufacture certain vital substances
* Reduces heart disease
Disadvantages of hard water
* It wastes soap
* It interferes with dyeing and tanning process.
* It tends to make white clothes grey when they are laundered.
Advantages of soft water
* Lathers well with soap, does not form scum therefore saves soap
* Suitable for dyeing and tanning
* Does not form scale in boilers, kettles, radiators etc.
Disadvantages of soft water
* Has unpleasant taste
* Lack of Ca$^{2+}$ ions causes weak teeth and bones and does not promote good growth in shellfish, crabs and snails
* Increase the chance of heart disease
Water which does not lather readily with soap is called hard water
Hardness of water is caused by the presence of dissolved salts of calcium ion, magnesium ion or iron(III) ion in water
Water which lather readily with soap is called soft water.
Soft water does not contain calcium ion,magnesium ion or iron(III) ion
Advantages of hard water
* Has pleasant taste so used in brewery industry
* Hard water provides calcium, which is essential for bones, teeth, and shells formation in animals
* Hard water provides Ca$^{2+}$ ions which help in blood clotting in animals
* Hard water provides Ca$^{2+}$ ions which are used by plants to manufacture certain vital substances
* Reduces heart disease
Disadvantages of hard water
* It wastes soap
* It interferes with dyeing and tanning process.
* It tends to make white clothes grey when they are laundered.
Advantages of soft water
* Lathers well with soap, does not form scum therefore saves soap
* Suitable for dyeing and tanning
* Does not form scale in boilers, kettles, radiators etc.
Disadvantages of soft water
* Has unpleasant taste
* Lack of Ca$^{2+}$ ions causes weak teeth and bones and does not promote good growth in shellfish, crabs and snails
* Increase the chance of heart disease
4. The work done by force of 20 N on a body is 60 J. Calculate the distance through which the force moved
- A. 8.0 m
- B. 4.0 m
- C. 3.0 m
- D. 2.0 m
Answer: C. 3.0 m
Work done = Force x Distance
Distance = $\frac{Work done}{Force}$
Work done = 60 J
Force = 20 N
Distance = $\frac{60}{20}$ = 3 m
Work done = Force x Distance
Distance = $\frac{Work done}{Force}$
Work done = 60 J
Force = 20 N
Distance = $\frac{60}{20}$ = 3 m
5. Which of the following processes removes carbon from the atmosphere?
- A. Respiration
- B. Burning
- C. Decomposition
- D. Photosynthesis
Answer: D. Photosynthesis
Respiration
The chemical breakdown of organic food substances such as glucose in the living cells to release energy with or without molecular oxygen.
Burning
Combustion, or burning,is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
Decomposition
The process or effect of simplifying a single chemical entity into two or more fragments.
Photosynthesis
Photosynthesis is the process by which green plants manufacture food (starch/glucose) using carbon dioxide and water in the presence of sunlight and chlorophyll.
Respiration
The chemical breakdown of organic food substances such as glucose in the living cells to release energy with or without molecular oxygen.
Burning
Combustion, or burning,is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
Decomposition
The process or effect of simplifying a single chemical entity into two or more fragments.
Photosynthesis
Photosynthesis is the process by which green plants manufacture food (starch/glucose) using carbon dioxide and water in the presence of sunlight and chlorophyll.
6. A substance which is made up of the same kind of atoms is called
- A. a compound
- B. an element
- C. a mixture
- D. an ion
Answer and explanation: practise this paper on ePrep.
7. Which of the following statement(s) is/are true of a shadow? A shadow is formed
I. by a transparent object,
II. by an opaque object,
III. on a screen.
I. by a transparent object,
II. by an opaque object,
III. on a screen.
- A. I only
- B. II only
- C. I and III only
- D. II and III only
Answer and explanation: practise this paper on ePrep.
8. Which of the following diseases results from malnutrition?
- A. Scurvy
- B. Measles
- C. Malaria
- D. Gonorrhoea
Answer and explanation: practise this paper on ePrep.
9. The chemical formula of an aluminium sulphide is Al$_{y}$S$_{3}$.Determine the value of y
- A. 1
- B. 2
- C. 3
- D. 4
Answer and explanation: practise this paper on ePrep.
10. Which of the following sources of energy is/are renewable?
I. Wind
II. Coal
III. Crude oil
I. Wind
II. Coal
III. Crude oil
- A. I only
- B. I and II only
- C. II and III only
- D. I,II and III
Answer and explanation: practise this paper on ePrep.
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