Answer all the questions on the question paper.
Section A: Multiple Choice Questions [10 marks]
Write your answers in the boxes provided below.
Q
1
2
3
4
5
6
7
8
9
10
A
1.
Food moves along the digestive canal by _________________.
A
C
2.
4.
B
D
changes in concentration
air pressure
Which of the following best describes the functions of the colon?
A
B
C
D
3.
gravity
muscular contraction
Water absorbed
No
No
Yes
Yes
Enzymes secreted
No
Yes
No
Yes
During field training, soldiers often carry chocolates and biscuits with them as they
1
2
3
4
are easy to carry.
build their muscles.
are fond of chocolates and biscuits.
provide them energy, when they are hungry.
A
B
C
D
2 only
3 only
1 and 2
1 and 4
Some saliva was added to a sample of food. Iodine solution was added after 5 minutes.
The sample of food turned blue-black. Which of the following is not correct?
A
B
C
D
Starch is present in the sample of food.
The saliva contained starch.
The saliva converted the food into sugar.
The enzymes present in the saliva were unable to work.
1
5.
The table below shows the carbohydrate, fat and protein in 20g of rice and
20g of red meat.
Food
Rice
Red meat
Carbohydrate / g
17
2
Fat / g
0.2
10.3
Protein / g
1.2
2.5
From the table above, what would be the main end-products of digestion
from a meal of rice and red meat?
A
B
C
D
6.
Which statement is not true about frictional force?
A
B
C
D
7.
Weight is a force.
Weight is measured in kilograms.
Weight is measured by a spring balance.
Weight of an object is the force of gravity acting on the object.
A block of wood has a mass of 15 kg on Earth. What is its mass when it is placed in a
planet which has half of the Earth’s gravitational force?
A
B
C
D
9.
It creates heat in a car engine.
It helps us to walk without slipping.
It slows down a moving train.
It speeds up a body in motion.
Which statement about weight is incorrect?
A
B
C
D
8.
Amino acids, fatty acids and glycerol
Amino acids and glucose
Fatty acids, glycerol and glucose
Fatty acids and glycerol
7.5 kg
15 kg
30 kg
45 kg
Two cube boxes are resting on the floor. Cube B has sides which are twice as long as
those of cube A.
2
B
A
x cm
2x cm
If both cubes have the same weight, which statement is correct?
A
B
C
D
10.
The pressure exerted by
The pressure exerted by
The pressure exerted by
The pressure exerted by
A is 2 times the pressure exerted by B.
A is 4 times the pressure exerted by B.
A is the same as the pressure exerted by B
A is half the pressure exerted by B.
In 40 seconds, Mary covered a distance of 200m and Tim covered a
distance of 150m. Which of the statements given below is NOT true?
A
B
C
D
Mary’s speed is slower than Tim’s speed.
Mary took a shorter time than Tim to cover 100 m.
Mary covered a longer distance than Tim in the same amount of time.
Tim’s speed is slower than Mary’s speed.
Section B: Short Answer and Structured Questions [20 marks]
3
1.
The figure below shows how the amounts of different nutrients in food change as the food
pass along the alimentary canal. The width of each band indicates the amount of nutrient.
mouth
(a)
region X
Explain the term ‘Enzymes’.
small intestine
[1]
__________________________________________________________________
__________________________________________________________________
(b)
(i)
Identify region X.
[1]
____________________________________________________________
(ii)
Explain why the amount of fats does not decrease immediately after entering
the small intestine.
[2]
____________________________________________________________
____________________________________________________________
____________________________________________________________
(iii)
2.
Complete the diagram above to show what happens to starch from when it
enters the mouth until it leaves the small intestine.
[1]
The diagram below shows the human alimentary canal.
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(a)
Label the structures A, B, C and D on the diagram.
(b)
Name the liquid that is stored in structure B.
[2]
[1]
__________________________________________________________________
3.
A Visking tubing filled with red ink solution, and its end tightened with threads, is placed
in a beaker of water as shown below. The beaker of water eventually turns red after 1
hour. The set-up is often used as a model to illustrate the absorption of food in the small
intestine.
beaker of water
thread
Visking tubing
red ink solution
thread
The products of digestion are small enough to pass into the blood.
In the model, the ……………………….. represents the wall of the small intestine, while
the water represents ……………………. in our body. The digested food, represented by
………………………….., passes through the walls of the small intestine during
absorption.
4.
[2]
The figure below shows a block being pulled by a force on a surface. The force needed
to move the block is measured by a spring balance.
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spring balance
force
block
surface
(a)
(i)
State the force which oppose the movement of the block.
[1]
______________________________________________________________
(ii)
(b)
In the diagram above, draw an arrow to show the direction of the force stated
in (a)(i).
[1]
How would the reading on the spring balance be affected if the roughness of the floor
surface increases? (Assume that the wood is being pulled at the same speed.)
[1]
______________________________________________________________ ______
5
(a) Explain why it is possible for someone to lie on a bed of nails but a
person will feel great pain if the person steps on a nail lying on the floor.
[2]
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
(b) Calculate the pressure exerted by a parked car if its weight is 10,000 N and the
surface area of the each tyre in contact with the ground is 0.05 m2. Leave your
answer in the SI units.
(c)
The block has a mass of 2 kg and a dimension as shown below.
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[2]
2 cm
6 cm
10 cm
(i)
Calculate the weight of the block.
[1]
______________________________________________________________
(ii)
Calculate the greatest pressure that can be exerted by the block on the
ground.
***** End of Paper*****
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