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NAME:
CLASS:
Lessons 11-12
DATE:
Revision Test 1
Section A: Multiple-choice Questions (40 marks)
For each question, four options are given. One of them is the correct answer.
Make your choice (1, 2, 3 or 4). Write down the number in the brackets provided
after each question.
1.
The diagram shows the water cycle.
Process N
clouds
L
M
water
bodies
Which one of the following is correct?
2.
L
M
Process N
(1)
water vapour
rain
evaporation
(2)
rain
water vapour
evaporation
(3)
water vapour
rain
condensation
(4)
rain
water vapour
condensation
( )
Lina wants to conduct an experiment to find out if the strength of wind
would affect the rate of evaporation of water.
Which of the following variables must she keep the same in order for the
experiment to be fair?
A:
B:
C:
D:
Amount of water at the end
Temperature of surroundings
Amount of water in the beginning
Exposed surface area of the containers
(1) A and C only
(2) A, B and D only
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(3) B, C and D only
(4) A, B, C and D
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3.
4.
Which of the following underlined substances gain heat energy in the given
situations?
A:
B:
C:
D:
Ice melting in a glass of orange juice
Water evaporating from the ocean
Water droplets forming on a leaf surface in the morning
Ice pack placed on the forehead of a person with high fever
(1)
(2)
(3)
(4)
A and C only
B and D only
A, B and C only
B, C and D only
( )
Study the diagrams below carefully.
water
After it was left in
a room for 5 min
water droplets
Which of the following statements is/are true based on the diagram above?
5.
A:
B:
C:
Condensation has taken place.
Heat is lost by the water vapour in the air to the beaker.
The room temperature is lower than the temperature of the water at
the start of the experiment.
(1)
(2)
(3)
(4)
A only
A and B only
B and C only
A, B and C
( )
Every morning, Janice notices water droplets on the outside of the cars
even though it did not rain the night before.
Which of the following statements explains why this happens?
(1)
(2)
(3)
(4)
Water vapour on the car evaporated to the air.
Water vapour from the air condensed on the car.
Water droplets on the car condensed from the air.
Water droplets from the warm air evaporated on the car.
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6.
Jared wanted to study the factors that affect the rate of evaporation. He
used two of the set-ups as shown in the table below to conduct some
investigations.
Set-up
Material of
container
Exposed
surface area
(cm2)
Original
amount of
water (ml)
Temperature
of water at
the start (°C)
P
Plastic
200
500
50
Q
Glass
200
250
50
R
Plastic
400
500
50
S
Glass
200
250
70
Which are the possible aims of his investigation?
7.
A:
B:
C:
To find out if the material of container affects the rate of evaporation
To find out if the exposed surface area affects the rate of evaporation
To find out if the temperature of the water affects the rate of evaporation
(1)
(2)
(3)
(4)
A and B only
A and C only
B and C only
A, B and C
( )
The diagram shows the female reproductive system.
P
Q
R
S
In which part is the egg formed and the fertilised egg is developed?
Formation of Egg
Development of Fertilised Egg
(1)
R
P
(2)
Q
R
(3)
S
R
(4)
S
P
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8.
9.
Which of the following statements are true?
A:
B:
C:
D:
Sperms are produced by the males.
Eggs of all animals have hard shells.
Reproduction is a way to prevent extinction of a species.
When all living things reproduce, a sperm and an egg is needed.
(1)
(2)
(3)
(4)
A and C only
B and D only
A, C and D only
A, B, C and D
( )
Which one of the diagrams below illustrates that fertilisation had just taken
place in humans?
(1)
(3)
(2)
(4)
( )
10. Which of the following statements about the male reproductive cell is/are
correct?
A: It has a nucleus.
B: It is stored in the testes.
C: It is produced in the penis.
(1)
(2)
(3)
(4)
A only
A and B only
B and C only
A, B and C
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11. The diagram below shows two flowers from the same plant.
A
B
C
D
Which of the arrows represent(s) pollination?
(1)
(2)
(3)
(4)
A only
A and D only
B and C only
A, C and D only
( )
12. The diagram below shows the different parts of a flower.
B
C
A
D
Mary studied four similar flowers W, X, Y and Z from different plants. The
flowers share similar parts as shown in the diagram above. Some parts
were removed from each of the flowers before pollination.
Which one of the following flowers is still able to develop into a fruit?
Flower
Parts removed
(1)
W
A and C
(2)
X
B and C
(3)
Y
A and D
(4)
Z
A and B
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13. The parts of a seed are shown in the diagram below.
A
C
D
B
Which part of the seed provides food for the seedling?
(1)
(2)
(3)
(4)
A
B
C
D ( )
14. The following sentences describe how sexual reproduction in plants takes place. Arrange them in order.
A:
B:
C:
D:
E:
The male cell fuses with the female cell.
Pollen grains are transferred to the stigma.
The anther releases pollen grains.
The ovule develops into a seed.
A pollen tube grows towards ovule.
(1)
(2)
(3)
(4)
C→B→E→A→D
B→C→E→A→D
C→B→D→A→E
B→C→A→E→D
( )
15. What are the similarities between a spore and a pollen grain?
(1)
(2)
(3)
(4)
Both are dispersed by wind only.
Both are required for reproduction.
Both are produced by flowering plants.
Both are male reproductive cells of a plant.
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16. Alex set up four beakers, M, N, P and Q, as shown below. He placed three
green beans in each of the beakers. Beakers M, N and Q were kept at room
temperature while Beaker P was kept in the refrigerator.
green beans
dry
cotton
wool
covered with
cardboard
moist cotton
wool
M
placed in
refrigerator
N
green beans
moist cotton
wool
P
Q
He observed that the green beans in beakers N and Q germinated into
young seedlings while those in beakers M and P did not.
Which of the following conclusions can Alex draw based on his observation?
A:
B:
C:
Warmth is needed for the seeds to germinate.
Light is needed for the seeds to germinate.
Water is needed for the seeds to germinate.
(1)
(2)
(3)
(4)
A and B only
A and C only
B and C only
A, B and C
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17. Tammy made some paper-spinner models to represent fruits with wing-like
structures. She wanted to find out if the length of the blades of the paper
spinner will affect the time taken for it to reach the ground. She used the
same type of paper but varied the length of the blades to make the 3 paperspinner models, A, B and C, as shown below.
A
B
C
She threw the paper spinners from a fixed height and recorded the time
taken for them to reach the ground. The results are shown in the table
below.
Time taken for the paper spinner to reach the ground (s)
1st reading
2nd reading
3rd reading
Average
reading
Model A
3.3
3.5
3.3
3.4
Model B
4.5
4.7
4.4
4.5
Model C
5.9
6.1
6.2
6.1
What is the relationship between the length of the blade of each model and
the time taken for it to reach the ground?
(1) The longer the length of the blade, the longer the time taken for the
model to reach the ground.
(2) The longer the length of the blade, the shorter the time taken for the
model to reach the ground.
(3) The shorter the length of the blade, the longer the time taken for the
model to reach the ground.
(4) The shorter the time taken for the model to reach the ground, the
longer the length of the blade.
( )
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18. The two diagrams X and Y show two ways an organism can increase the
number of its kind.
egg
sperm
Diagram X
Diagram Y
Which of the following statements about the two ways are true?
Statement
Diagram X
Diagram Y
A
Only one parent is
involved.
Two parents are involved.
B
The offspring is genetically
identical to the parent.
The offspring is not genetically
identical to the parents.
C
It involves external
fertilisation.
It involves internal fertilisation.
(1) A only
(2) C only
(3) A and B only
(4) A, B and C
19. A and B are fruits from different plants.
( )
soft hair
A
hooks
B
How are fruits A and B dispersed?
A
B
(1)
Animal
Wind
(2)
Animal
Animal
(3)
Wind
Animal
(4)
Wind
Wind
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20. The diagrams below show the fruits of 3 different plants.
fruit dried up
when ripe
wing-like
structure
Fruit A
stiff hairs
Fruit B
Fruit C
The diagrams below show three possible dispersal patterns X, Y and Z.
Pattern X
Pattern Y
1 km
Pattern Z
1 km
1 km
Legend:
parent plant
young plant
direction of wind
Which of the following best represents the dispersal pattern of the fruits A,
B and C?
Pattern X
Pattern Y
Pattern Z
(1)
A
B
C
(2)
B
C
A
(3)
B
A
C
(4)
C
A
B
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Section B: Open-ended Questions (20 Marks)
For the following questions, write your answers in the spaces provided. The
marks awarded are shown in the brackets at the end of each question or part
question.
1.
Four identical bath towels, P, Q, R and S, each containing the same amount
of water, were left to dry under different conditions as shown below.
Condition 1
Condition 2
Condition 3
Condition 4
towels folded
into half
sunny and
not windy
sunny and
windy
shady and
not windy
shady and
windy
The mass of each bath towel at the start of the experiment and after three
hours are recorded and the results are shown in the table below.
Bath
towel
Mass of bath towel at the
start of the experiment (g)
Mass of bath towel after
three hours (g)
P
200
80
Q
200
120
R
200
140
S
200
160
(a) Based on the results in the table above, match the bath towels, P, Q,
R and S, to the correct conditions that they were left out to dry. (2m)
Conditions
Bath towels
1
2
3
4
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John hung his clothes out to dry using three methods, A, B and C.
A
B
C
(b) Which method, A, B or C, should John choose to hang his clothes if he
wanted his clothes to dry the fastest? Explain your answer. (2m)
2.
Jacob set up an experiment to boil some seawater.
metal tray
water droplet
Beaker Y with
seawater
Beaker X
with water
A metal tray was placed over Beaker Y as the seawater was heated.
(a) Name the processes that have taken place that caused the water
droplets to be formed on the metal tray. (1m)
(b) Explain how the water in Beaker X was obtained. (2m)
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(c) After 20 minutes, Jacob realised that less water droplets were formed
on the metal tray. Explain why. (1m)
3.
The diagrams below show two flowers. One is insect-pollinated and the
other is wind-pollinated.
Flower X
Flower Y
Which flower, X or Y, is wind-pollinated? Explain why. (2m)
4.
Diagrams 1 and 2 below show the reproductive systems of a plant and a
human respectively.
Diagram 1
Diagram 2
(a) Based on the diagrams, state one similarity and one difference between
the reproductive systems of the plant and human. (2m)
Similarity:
Difference:
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(b) In an experiment, two similar flowers, A and B, from a growing plant
were used. The different parts from each of these flowers were removed
as shown in the diagram below.
Flower A
Flower B
Some pollen grains from the same type of flower were then dusted
over the flowers.
(i)
In which flower, A or B, would the formation of fruits occur? Give
a reason for your answer. (1m)
(ii) There are two known methods of pollination namely insect
pollination and wind pollination. Recently, farmers started
practising mechanical pollination where pollen is sprayed in large
amount from an aircraft to the fields.
Suggest how mechanical pollination can help farmers. (1m)
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5.
David collected four identical balsam fruits and changed the temperature in
which the fruits were kept. The results are shown in the table below.
A
B
C
D
Temperature (°C)
15
25
30
40
Distance scattered (m)
0
2
3
4
(a) What is the aim of David’s experiment? (1m)
(b) Which fruit split with the greatest force? Explain why. (1m)
(c) Why does David need to ensure that the balsam fruits are similar in
size and shape? (1m)
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6.
There are six green beans on each tray. Trays B, C and D contained some
water but not Tray A. The green beans on Tray C are first boiled before they
are put on the tray. Tray B is left in the freezer while the rest of the trays are
left in the open field for three days.
water
water
water
boiled green
beans
Tray A
in open field
Tray B
in freezer
Tray C
in open field
Tray D
in open field
(a) On which tray would you see the beans germinating after three days?
(1m)
(b) Why do the green beans in the other three trays not grow into young
plants? (2m)
Trays
Reasons for not germinating
Tray
Tray
Tray
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