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7.3
Word Translation (4 marks)
i Write
down the English terms of the following Chinese terms:
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Chinese
term
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English
term
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1
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消費者
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Consumer
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2
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食物鏈
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Food chain
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3
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光合作用
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Photosynthesis
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4
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Producer
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Fill in the Blanks (7 marks)
1 Green
plants can make their own food by Photosynthesis.
In this process, light
energy is converted into chemical
energy which is stored in food / starch.
2 Green
plants are producers
because they can make their own food and provide food for all animals either
directly or indirectly. On the contrary, animals cannot make their food and
must feed on plants or other animals, so they are called consumers.
3 The
feeding relationships between plants and animals can be shown by food chain.
Multiple
Choice (4 marks)
Circle the letter of
the best answer for each question.
1. Which of the following is a word equation
for photosynthesis?
A. Oxygen + Carbon
dioxide à Water + Starch
B. Water + Oxygen à Carbon dioxide + Starch
C. Starch + Water à Oxygen + Carbon dioxide
D. Carbon dioxide + Water à Starch + Oxygen
2. What is the main way that green plants
obtains water?
A. The leaves
absorb the water vapour in air.
B. The roots absorb water from the soil.
C. The leaves
absorb the water from water droplets on the leaf surfaces.
D. The roots
absorb the water vapour present among soil particles.
Directions: The following
diagram shows the set-up of an experiment on photosynthesis. Refer to the
diagram and answer questions 3 and 4.
3. What is the use of the sodium hydrogencarbonate solution?
A. To absorb the carbon dioxide in water
B. To provide carbon dioxide for the water plant
C. To provide
oxygen for the water plant
D. To absorb
light from the lamp
4. Gas X can ____________________ .
A. turn cobalt
chloride paper from blue to pink
B. turn lime
water milky
C. relight a glowing splint
D. turn
hydrogencarbonate indicator red
Short
Questions (6 marks)
The
following shows a food chain.
P à Q à R à hawk
(a) What
is the role of P in the food chain? Suggest an example of P. (2 marks)
P is a producer. It may be grass.
(b) What
are the roles of Q, R and hawk in the food chain? Suggest an example of Q. (2 marks)
They are consumers. Q may be a rabbit (or any
other animals which feed on green plants.)
(c) Suggest
ONE difference between the roles of Q and R. (Bonus:
2 marks)
Q feed on green plants but R feed on other animals.
(d) What
is the importance of photosynthesis to the environment? (2 marks)
Photosynthesis produce food for all living things
directly or indirectly. Also, it balances the contents of oxygen and carbon
dioxide in atmosphere.
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