KWUN TONG GOVERNMENT SECONDARY SCHOOL
FIRST TERM TEST, 2001-2002
Form Two Integrated Science
Class
: S. 2 ( )
Date
: 7-11-2001
Name
: _____________________
Time
: 11:20 - 11:55 am
Class No. : ________
Full Mark : 50
Answer all of the questions in answer sheet
(A)
1
Multiple Choice (20%)
An oxygen cylinder in a room is leaking. What would happen when a man,
smoking a cigarette, enters the room?
A
There would be an explosion
B
The cigarette would stop burning
C
The cigarette would burn more brightly
D
The man would find it difficult in breathing
2
Which of the following are true for carbon dioxide?
(1)
It is colourless
(2)
It turns red indicator purple
(3)
It is required for photosynthesis
(4)
It turns lime water yellow
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(3) and (4) only
3
How does a group of students affect the composition of the air in a hall?
Oxygen
Carbon dioxide
Water vapour
Nitrogen
A
increases
increases
decreases
decreases
B
increases
increases
increases
no change
C
decreases
decreases
increases
decreases
D
decreases
increases
increases
no change
4
Some ice is put into a test tube. Colourless liquid forms on the outside of the test
tube. The colourless liquid
A
turns blue cobalt chloride paper pink
B
turns pink cobalt chloride paper blue
C
turns red indicator yellow
D
turns lime water orange
5
When bread is burned in oxygen, a gas is produced which turns lime water milky.
This shows that bread has
A
carbon
B
hydrogen
C
oxygen
D
nitrogen
1
6
Which of the following is FALSE about the differences between breathing and
photosynthesis?
A
Breathing takes place in all living things but photosynthesis only takes
place in green plants
B
Breathing produces water but photosynthesis builds up food
C
Breathing produces carbon dioxide but photosynthesis needs carbon
dioxide
D
Breathing needs carbon dioxide but photosynthesis produces carbon
dioxide
7
What do the plants need for photosynthesis?
A
chlorophyll and nitrogen
B
nitrogen and light
C
carbon dioxide and light
D
hydrogen and light
Directions: Questions 8 to 10 refer to the diagram below:
8
What is chemical X?
A
sodium chloride
B
washing soda
C
soda lime
D
lime
9
What is the function of the wire gauze?
A
to divide the boiling tube into two portions
B
to support the breathing of the grasshopper
C
to prevent the grasshopper from touching chemical X
D
to prevent chemical X from pressing the grasshopper
10
During the experiment, it is observed that the coloured liquid index gradually
moves towards the boiling tube. Which of the following are correct explanation
for this?
(1)
The grasshopper uses up oxygen
(2)
Chemical X absorbs carbon dioxide released by the grasshopper
(3)
Chemical X absorbs water vapour released by the grasshopper
A
(1) only
B
(1) and (2) only
C
(1) and (3) only
D
(1), (2) and (3)
2
(B)
Fill in the blanks (10%)
1. Green plants produce (a)_________ and (b)__________ during photosynthesis.
2. Carbon dioxide turns red (c)_____________ indicator yellow and lime water
(d)___________.
3. A firebreak takes away (e)____________ during a forest fire.
4. Water can be used to put out a fire since it can take away (f) __________.
5. (g)_____________ is the process of breaking down food to release energy.
6. Burning produces (h) ____________ energy and (I)____________ energy.
7. A glowing splint is used to test for oxygen and it will (j) ___________.
(C)
1
Short Questions (20%)
The diagrams below show the process for testing starch in a green leaf. (11%)
D
E
(a)
(b)
Arrange the diagrams in the CORRECT order using A-E. (5%)
Explain the reasons of steps A and D. (6%)
2
You are given the following apparatus. Draw a picture to show how you can
collect breathed air in a gas jar. (3%)
3
3 a)
Explain why a burning splint burns brighter in Y than that in X. (2%)
3(b)
A student carries out test on two gases P and Q. The results of the test are shown
in the table below. (4%)
Test
Burning splint
Gas P
Goes out
Gas Q
Burns more brightly
i) What are gases P and Q? (2%)
ii) What will happen if limewater is added to Gas P and Gas Q? (2%)
END OF PAPER
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