2022 BECE INTEGRATED SCIENCE ESSAY
Paper 2 — Essay (100 marks) — 1¾ hours
This paper is in two sections: A and B. Answer Question 1 in Section A and any other four questions in Section B.
Answer all the questions in your answer booklet.
Credit will be given for clarity of expression and orderly presentation of material.
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1. Question
Section A (40 marks)
Answer all of Question 1.
1. (a)
The diagrams below are illustrations of an experimental set-up.
Study the diagrams carefully and answer thequestions that follow
(i) Identify each of the parts labelled I, II and III. [3 marks]
(ii) Name the method of separation in each of the set-up:
(a) A;
(b) B. [2 marks]
(iii) State the class of mixtures that the experimental set-up A could be used for. [1 mark]
(iv) Give a reason for the answer stated in (iii). [2 marks]
(v) Name one possible component of the mixture in set-up B. [1 mark]
(vi) State the function of the part labelled IV. [1 mark](b)
The diagram below is an illustration of a part of a system in humans.
Study the diagram carefully and answer the questions that follow.
(i) Name the system illustrated. [1 mark]
(ii) Name each of the parts labelled I, II, III and IV. [4 marks]
(iii) What is the role of the part labelled I? [1 mark]
(iv) Name three diseases that affect the system illustrated. [3 marks](c)
The diagram below is an illustration of an experimental set-up used to measure an ecological factor.
Study the diagram carefully and answer the questions that follow.
(i) Identify the apparatus illustrated. [1 mark]
(ii) Name each of the parts labelled I, II and III. [3 marks]
(iii) Give one use of each of the parts labelled I and II. [2 marks]
(iv) What ecological factor was measured? [1 mark]
(v) State three ways in which the ecological factor measured in (iv) is important in agricultural soils. [3 marks]
(vi) Name one farm tool that aids the ecological factor measured in (iv) to perform its function in agricultural soil. [1 mark]
(vii) Describe how the farm tool named in (vi) is used to aid the factor measured in the experiment. [2 marks](d)
The diagrams below are illustrations of electrical circuits.
Study the diagrams carefully and answer the questions that follow.
(i) Identify each of the components labelled I, II and III. [3 marks]
(ii) State the type of arrangement of resistors (A) in B. [1 mark]
(iii) State the effect of the arrangement of resistors in each of the diagrams A and B. [2 marks]
(iv) Give a reason for each of the answers stated in (iii). [2 marks]SECTION B
Answer four questions only from this section- (a) State three differences between metals and non-metals in terms of their physical properties. [3 marks]
(b)
(i) Explain the term active region as applied to transistors;
(ii) State what happens in the active region of a transistor. [3 marks](c)
(i) State two effects of lack of protein in the diet of humans.
(ii) Describe briefly the chemical test for glucose. [5 marks](d)
(i) What are soil resources?
(ii) State two agricultural activities which make the soil lose its nutrients. [4 marks](e)
(i) List in the correct order, the organs through which food passes from the mouth to the anus. [2 marks]
(ii) State the components of a balanced ration for feeding poultry. [4 marks](f) Predict the products formed when:
(i) magnesium solution reacts with dilute hydrochloric acid;
(ii) potassium reacts with water. [4 marks](g)
(i) State two effects of heat on a substance.
(ii) Potassium permanganate crystals are dropped into a beaker of water and warmed:
(a) State what would be observed;
(b) State the phenomenon demonstrated in (a). [5 marks]- (a)
(i) Name the stages in the life cycle of a mosquito.
(ii) Name the stage at which feeding does not take place.
[5 marks]
(b) Explain briefly why air is regarded as a mixture.
[2 marks](c)
(i) What is a magnetic pole?
(ii) State two uses of temporary magnets.
[4 marks](d) Give four reasons for planting crops in rows.
[4 marks]- (a)
(i) Name two elements which make the teeth of mammals strong.
(ii) Name two common diseases of the human teeth.
[4 marks]
(b) State three reasons why soil cannot support effective plant growth.
[3 marks](c)
(i) An atom has 13 protons and 14 neutrons:- draw and label the structure of the atom.
(ii) State its valency.
[4 marks]
(d)
(i) State three ways in which fluid pressure is applied in everyday activities.
(ii) State one substance that is an insulator.
[4 marks]- (a) Explain the term mixed cropping.
[2 marks]
(b)
(i) What is an alloy?
(ii) Name the constituent elements in brass.
[3 marks](c)
(i) State three effects of dumping waste materials into water bodies.
(ii) State one function of each of the following factors in photosynthesis:- (a) chlorophyll;
- (b) water.
[5 marks]
(d)
(i) What is work?
(ii) A block of wood of mass 10 kg was dragged through a distance of 3.2 m when a force of 20 N was applied. Calculate the work done.
[5 marks]END OF ESSAY TEST
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