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Science questions, unit 10
Nama / NameKelas / ClassTarikh / Date

Machine

28 marks. Use Practice to check each answer as you go, or Exam to answer everything against the clock first.

Section A: objective questions

8 marks
Choose the best answer for each question.
1

Question 1

What is a pulley?
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A
A pulley is a simple machine which enables a load to be lifted easily using lesser force (textbook p. 128).
For the teacher: Remembering, low difficulty, standard 10.1.1
Textbook p. 128
2

Question 2

The wheel of a pulley turns around a rod in its centre. What is this rod called?
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C
The axle is the rod in the centre. The wheel turns around it.
For the teacher: Remembering, low difficulty, standard 10.1.1
Textbook p. 128
3

Question 3

Why does a pulley wheel have a groove?
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B
A fixed pulley has a wheel with a groove that lets the rope pass through it. The groove keeps the rope on the wheel.
For the teacher: Understanding, low difficulty, standard 10.1.1
Textbook p. 128
4

Question 4

Diagram 1 shows Amir raising the flag at school. He pulls the rope downwards. What happens to the flag?
A pupil pulls a rope at a flagpole; a close-up shows a pulley at the top
Diagram 1
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D
The flagpole has a fixed pulley at the top. When the rope is pulled down, the flag on the other side moves up.
For the teacher: Understanding, low difficulty, standard 10.1.3
Textbook p. 131
5

Question 5

Which activity does not use a pulley?
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C
Cutting a cake uses a knife, not a pulley. The other three are uses of pulleys in the textbook.
For the teacher: Understanding, low difficulty, standard 10.1.3
Textbook p. 131
6

Question 6

Diagram 2 shows a crane model. Mei Ling wants to lift the load. What should she do?
A crane model with a yellow pulley on the pole and a black pulley at the end of the arm; a load hangs from the rope
Diagram 2
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A
The yellow pulley acts as a motor. Turning it pulls the rope through the groove of the black fixed pulley, so the load goes up.
For the teacher: Applying, medium difficulty, standard 10.1.2
Textbook p. 130
7

Question 7

Why do workers at a construction site use a crane with a pulley?
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D
A pulley on a crane makes lifting the building materials easier. It does not change how heavy they are.
For the teacher: Understanding, medium difficulty, standard 10.1.3
Textbook p. 136
8

Question 8

Diagram 3 shows two types of pulleys, P and Q. In Q, the pulley wheel hangs on the rope and moves up with the load. Which is correct?
P: one pulley fixed to the ceiling and another pulley on the load. Q: one pulley hanging on the rope above the load
Diagram 3
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B
P uses a fixed pulley and a movable pulley together, so it is a compound pulley. Q's wheel moves with the load, so it is a movable pulley.
For the teacher: Analysing, medium difficulty, standard 10.1.3
Textbook p. 135

Section B: structured questions

20 marks
Answer all the questions.
9

Question 9

Diagram 4 shows a fixed pulley. Name the parts labelled P, Q and S.
A fixed pulley with four labels: P on the edge of the wheel where the rope sits, Q on the wheel, R at the centre of the wheel, S on the rope
Diagram 4
[1 mark] (a)P
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Groove
[1 mark] (b)Q
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Wheel
[1 mark] (c)S
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Rope
For the teacher: Remembering, low difficulty, standard 10.1.1
Textbook p. 128
10

Question 10

Diagram 5 shows three pictures, P, Q and R, of a crane model lifting a load.
The load is high up near the black pulley
P
The load rests on the table
Q
A hand turns the yellow pulley; the load is halfway up
R
[1 mark] (a)Write P, Q and R in the correct order: before, while and after the load is lifted.
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Tick each point you got.
[1 mark] (b)When the rope is pulled, the load moves
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upwards
[1 mark] (c)Which pulley acts as the fixed pulley?
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The black pulley
The black pulley at the end of the arm is the fixed pulley. The yellow pulley acts as a motor.
For the teacher: Understanding, medium difficulty, standard 10.1.2
Textbook p. 130
11

Question 11

Does each activity use a pulley? Choose Yes or No.
[1 mark] (a)Pulling up fishing nets on a fishing boat
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Yes
[1 mark] (b)Riding a bicycle to school
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No
[1 mark] (c)Unloading a container from a ship at the port
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Yes
For the teacher: Applying, low difficulty, standard 10.1.3
Textbook p. 131
12

Question 12

Diagram 6 shows Pak Abu lifting a bucket of water from a well in two ways, P and Q.
A man pulls a bucket straight up from a well with only a rope
P
A man pulls a rope down to lift a bucket from a well through a pulley on a frame
Q
[1 mark] (a)Which way is easier?
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Q
[1 mark] (b)Give one reason for your answer.
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Any 1 points
Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 10.1.3
Textbook p. 131
13

Question 13

Diagram 7 shows a crane at a construction site.
A tower crane lifts steel beams; a close-up shows the pulley and hook
Diagram 7
[1 mark] (a)The pulley on this crane helps to lift
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building materials
[1 mark] (b)What will happen to the building work if pulleys are not used?
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Any 1 points
Textbook HOTS answer (p. 136): building without pulleys takes a longer time and needs more workers.
Tick each point you got.
For the teacher: Evaluating, high difficulty, standard 10.1.3
Textbook p. 136
14

Question 14

Are these statements true or false?
[1 mark] (a)A pulley is a simple machine.
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True
[1 mark] (b)A fixed pulley moves up together with the load.
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False
A fixed pulley stays in one place. Only its wheel turns.
[1 mark] (c)When the rope is pulled through the groove, the wheel turns.
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True
For the teacher: Understanding, low difficulty, standard 10.1.1
Textbook p. 128
15

Question 15

Diagram 8 shows a problem at an apartment. Aina wants to build a pulley model to help.
Residents carry buckets of water up the stairs from a water lorry because the water supply has been cut off
Diagram 8
[1 mark] (a)Name one recycled material Aina can use to build her pulley model.
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Tick each point you got.
[1 mark] (b)Which material can she use as the axle?
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A straw
[1 mark] (c)When Aina tests her model, the rope keeps slipping off the wheel. Suggest one way to fix it.
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Any 1 points
Tick each point you got.
For the teacher: Creating, high difficulty, standard 10.1.4
Textbook p. 133
16

Question 16

Diagram 9 shows a crane at a port.
A crane at a port lifts a shipping container from a ship
Diagram 9
[1 mark] (a)State the function of the pulley on this crane.
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Tick each point you got.
For the teacher: Remembering, low difficulty, standard 10.1.3
Textbook p. 135