BECE 2013 Integrated Science Paper 2 Essay
BECE Past Questions and Answers
BECE 2013 Integrated Science Paper 2
Essay (Section II)
PART 1 – 40 marks
Answer Question 1 only
1. (a) The
diagrams below are illustrations of an experiment to demonstrate a biological
principle
Study the diagrams carefully and answer the questions that follow
Study the diagrams carefully and answer the questions that follow
i.
Name the parts
labelled I and II.
ii.
State two
difference between the set-ups A and B.
iii.
What is the role
played by the part labelled I in the experiment?
iv.
Name the biological
principle being demonstrated in this experiment.
v.
State one way in
which plants benefit from the principle named in (iv).
vi.
State one way in
which plants benefit from the principle named in (iv).
(b)
In an experiment to investigate the reactivity of
zinc, a piece of the metal was dropped into a test tube containing dilute
hydrochloric acid.
The
experimental set-up is illustrated below.
Study the set-up carefully and
answer the questions that follow.
i.
Write a balanced chemical equation for the reaction that occurred
in the experiment.
ii.
Name the gas evolved.
iii.
List two metals which can react in a similar way as the zinc.
iv.
List two metals which cannot react in a similar way as the zinc.
v.
Name two glass apparatus which could have been used instead of the
test tube.
(c.)
The diagram below is an illustration of a thermos flask.
Study the diagram carefully
and answer the questions that follow
i.
i.
Name the parts labelled I, II,
III, IV and V
ii.
How does the device minimize
heat loss or gain through:
(𝛼) conduction?
(𝛽) convection?
(𝛾)
radiation?
iii.
State one use of the thermos
flask.
(d)
The diagrams below illustrate
an experimental set-up on a physical property of soil using three soil types, X,
Y and Z.
Study the set-up carefully and answer
the questions that follow:
i.
Name the parts of the set-up labelled I, II, III and IV
ii.
Which of the three soil types has the
(𝛼) highest water holding capacity?
(𝛽) least water holding capacity?
iii.
Name each of the three soil types X, Y and Z
iv.
Suggest a suitable title for the experiment.
PART II (60 marks)
Answer four Questions only from this part
2. (a) List the three particles
which make up matter [3 marks]
(b) State four hereditary features in humans [4 marks]
(c) State the energy transformation that takes place in each of the
following activities:
(i) dry cell in use;
(ii) solar panel in use;
(iii) electric stove in use;
(iv) hammering of a piece of metal
[4
marks]
(d) State two ways each in which
each of the following cultural practices is important in vegetable production:
(i)
staking
(ii)
pruning
[4
marks]
3. (a) (i) What is indiscriminate
sex?
(ii) Give two reasons why teenagers indulge in
indiscriminate sex.
[4
marks]
(b) Name two sources each of
(i) natural light
(ii) artificial light
[4 marks]
(c) State three ways in which soil
texture is important in crop production.
[3
marks]
(d) Write down the systematic name
of each of the following chemical compounds:
(i) FeS
(ii) CO
(iii) Cu2O
(iv) NaOH [4 marks]
4. (a) (i) What do the
symbols L, N and E represent in an electric plug?
(ii) What is the function of the fuse
box in household electrical wiring?
[4 marks]
(b) Mention four classes of insect pest
based on their feeding habits [4 marks]
(c) Classify the first four elements of the
periodic table as metals and non-metals
[4
marks]
(d) Name the three types of blood vessels in
humans
[3 marks]
5. (a) (i) State the
difference between organic fertilizer and inorganic fertilizer
(ii) State two effects of inorganic
fertilizer on the environment
[4
marks]
(b) Classify the following substances as
acids or bases.
(i) unripe lemon juice;
(ii) wood ash;
(iii) liquid in a car battery;
(iv) bicarbonate of soda [4 marks]
(c) (i)
What is a fruit?
(ii)
State two differences between a fruit and a seed. [4 marks]
(d) State the effect of heat on each of the
following substances:
(i) plastics
(ii) alcohol
(iii) metal rod
[3 marks]
6. (a) Classify the
following chemical substances based on their uses under the headings as shown
in the table below:
Milk of magnesia,
alcohol, paracetamol, sodium hydroxide, N.P.K.
Agriculture
|
Industry
|
Medicine
|
[5 marks]
(b)
State one use each of the following instruments used in the study of the
weather:
(i)
rain gauge;
(ii)
hygrometer;
(iii)
anemometer. [3 marks]
(c)
(i) Name two types of transistors.
(ii) Draw and label the circuit symbols
of the transistors named in (i)
[4
marks]
(d)
State three reasons why vegetable farming is important.
[3 marks]
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