Lui Cheung Kwong Lutheran College
Form 2 Integrated Science
Uniform Test 1 (2012-2013)
Class﹕F.2 _____
Time allowed﹕40 minutes
Name﹕_______________________
Date﹕26th October, 2012
No﹕________
Total mark﹕60
Notice：
(1) This paper is divided into two sections, A and B. Answer ALL questions.
(2) Section A are multiple choice questions, answers should be written down on the MC
answer sheet provided.
(3) Section B are structural questions, answers should be written down on the answer sheet
provided.
Section A: Multiple Choice Questions (15 marks)
1.
The pie chart below shows the composition of air. What are X, Y and Z?
(78%)
(0.9%)
(21%)
A
B
C
D
2.
X
Y
Z
Noble gases
Noble gases
Nitrogen
Nitrogen
Nitrogen
Carbon dioxide
Carbon dioxide
Noble gases
Oxygen
Nitrogen
Oxygen
Oxygen
Which of the following objects can be used to test for nitrogen?
(1)
(2)
(3)
Glowing splints
Hydrogencarbonate indicator
Lime water
A
B
C
D
(1) only
(2) only
(3) only
None of them
LCK/12-13/UT1/IS-Eng/F.2/P1
3.
4.
5.
What happens to the indicator when carbon dioxide is tested with
hydrogencarbonate indicator?
A
The indicator turns milky.
B
C
D
The indicator turns red.
The indicator turns pink.
The indicator turns yellow.
When a burning splint is put into an unknown gas, it goes out. The gas may
be
(1) carbon dioxide.
(2) nitrogen.
(3)
A
B
C
oxygen.
(1) only
(2) only
(1) and (2) only
D
(2) and (3) only
Which of the following statements about breathed and unbreathed air are
correct?
(1)
(2)
(3)
A
B
C
D
6.
Breathed air contains more carbon dioxide than unbreathed air.
Breathed air contains more water vapour than unbreathed air.
Breathed air contains no oxygen.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
A paper cup half-filled with water is heated over a candle flame. The paper
cup does not catch fire.
Which of the following best explains the phenomenon?
A
B
The water brings the heat away so that the cup does not get
hot enough to start burning.
The water blocks the oxygen from the cup.
C
D
The water does not support burning.
There is not enough fuel.
LCK/12-13/UT1/IS-Eng/F.2/P2
7.
Why can carbon dioxide be used to put out a fire?
(1) Carbon dioxide does not support burning.
(2) Carbon dioxide is denser than oxygen.
(3) Carbon dioxide contains no chemical energy.
A
B
C
D
8.
Can we use argon (a noble gas) to put out a fire? Why?
(Hint: Argon is denser than oxygen.)
A
No. Only carbon dioxide can be used to put out a fire.
B
C
D
9.
11.
No. Argon supports burning.
Yes. Argon does not burn in oxygen.
Yes. Argon does not support burning and it can displace the
oxygen surrounding the object on fire.
Katy is pushing her bicycle up a hill. Where does she get the energy to push
her bicycle?
A From food
B
C
D
10.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
From the exercise she did earlier
From the ground she is walking on
From the bicycle she is pushing
The energy value of food can be measured in
A
kilograms.
B
kilocalories.
C
kilometres.
D
degree Celsius.
Which of the following factors affect(s) the energy content of food?
(1) Type of food
(2) Temperature of food
(3) Weight of food
A
(1) only
B
(1) and (2) only
C
(1) and (3) only
D
(2) and (3) only
12.
Which of the following are products of photosynthesis?
(1) Carbon dioxide
(2) Oxygen
(3) Starch
(4) Water
A
B
C
D
(1) and (3) only
(2) and (3) only
(2) and (4) only
(2), (3) and (4) only
LCK/12-13/UT1/IS-Eng/F.2/P3
13.
During photosynthesis, light energy is changed to
A
chemical energy.
B
heat energy.
C
sound energy.
D
14.
Which of the following in NOT needed in photosynthesis?
A
Light
B
C
D
15.
starch.
Chlorophyll
Oxygen
Carbon dioxide
Which part of a tree takes in carbon dioxide during photosynthesis?
A
Green leaves
B
Flowers
C
Roots
D
Stems
LCK/12-13/UT1/IS-Eng/F.2/P4
Section B: Structural Questions (45 marks)
1.
Describe and explain how the intercostal muscles and the diaphragm
work together to allow us to breathe in by completing the following
paragraph.
3marks
When we breathe in, the intercostal muscles
(a)__________________ and pull the ribs
(b)__________________________________. At the same time, the
diaphragm
(c)____________________________________________________.
These movements increase the (d)_________________ of the chest
cavity and therefore the (e)_______________________ inside it
decreases (1). When the gas pressure inside the chest cavity
becomes (f)_________________________
______________________, air is drawn into the lungs.
2.
Lily's teacher gave Lily a gas X. Lily was told that gas X was oxygen,
carbon dioxide or nitrogen. To identify the gas, Lily carried out some
simple tests and got the following results.
1mark
Tests and got the following results.
Test
Treatment
Result
I
Put a burning splint into gas X.
The flame went out.
II
Bubbled gas X through lime water. It remained clear.
(a)
Based on the result of test I only, what conclusion can you draw?
(b)
Based on the results of tests I and II, what conclusion can you
draw?
1mark
Suggest an alternative to replace lime water in test II. State its
colour change if it was used in the test.
Firefighters often use water to extinguish a fire.
(a) Explain how water can extinguish a fire.
2marks
(b) Write down THREE methods of putting out a small fire
3marks
Green plants carry out photosynthesis under sunlight.
(a) Write down the word equation for photosynthesis
(b) Write down the energy conversion involved in photosynthesis.
3marks
(c)
3.
4.
LCK/12-13/UT1/IS-Eng/F.2/P5
2marks
2marks
5.
6.
The diagram below shows a leaf being heated in alcohol in a test for
starch.
3marks
(a) Point out ONE mistake in the above set-up and give a reason.
(b) What happen to the colours of the leaf and the alcohol?
(c) What is the purpose of putting the leaf into alcohol?
(d) What should be added to the leaf to test for starch?
2marks
1marks
1mark
(e)
1mark
Write down the test result if starch is present in the leaf.
Janet prepares the set-up below.
2marks
light
ligh
cotton
B
A
conical
Conical flask
soda lime
stand and clamp
(a)
What is the use of soda lime pellets?
(b) What condition is Janet going to investigate?
1mark
(c) What is the product of photosynthesis that Janet tests for?
1mark
(d) Ｗhich flask act as a control experiment?
1mark
(e) Why does Janet set up a control for the experiment?
2marks
(f) The plant has to be destarched before the experiment. How and
why?
2marks
LCK/12-13/UT1/IS-Eng/F.2/P6
7.
The diagram below shows a food web in grassland.
eagle
snake
Rat
grasshopper
bushes
grasses
(a)
What is a food chain?
2marks
(b)
Write down the longest food chain in the above food web.
2marks
(c) Identify the producer(s) and consumer(s) in the above food web.
3marks
(d) What will happen to the numbers of snake and grasshopper if
most of the rodents suddenly died from a certain disease? Explain
4marks
briefly.
LCK/12-13/UT1/IS-Eng/F.2/P7