John Buchan Middle School 1

John Buchan Middle School

Science Test Revision

3E Magnets and Springs

36 min

34 marks Name

John Buchan Middle School 2

Level 3

1. Exploring magnetism

(a) Sarah ties a paper clip to a piece of thread.

She sticks the thread to the table.

She holds a magnet above the paper clip.

Draw an arrow on the picture below to show the direction of the magnetic force acting on the paper clip.

plasticine

table

thread

paper clip

magnet

1 mark

(b) What happens to the paper clip when Sarah lifts the magnet away?

...................................................................................................................... 1 mark

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(c) Sarah repeats her experiment using different objects instead of the paper clip.

Which of the following will act in the same way as the paper clip?

Tick ONE box.

aluminium foil plastic pen lid

steel pin wooden match

1 mark

(d) Joel has two magnets. He puts one on the table. He holds the other magnet close to it, like this:

The magnets do not touch each other, but the magnet on the table is pushed away.

Why is the magnet on the table pushed away?

......................................................................................................................

...................................................................................................................... 1 mark

John Buchan Middle School 4

Level 4

2. Magnets

(a) Rob holds a magnet near a nail. The magnet attracts the nail.

Name ONE metal the nail could be made from.

....................................................................................................................... 1 mark

(b) Rob gets some more magnets. He finds out which magnet is strongest by putting pieces of paper between each magnet and the nail.

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The table below shows how many pieces of paper Rob puts between each magnet and the nail before the nail falls off.

Magnet A B C D

Number of pieces of paper

74 3 60 100

Rob has not drawn the result for magnet C on the graph.

Use the results in the table to complete the graph for magnet C.

Numberof piecesof paper

100

90

80

70

60

50

40

30

20

10

0A B C D

Magnet

1 mark

(c) (i) Tick ONE box to show which magnet is strongest.

A

B

C

D

1 mark

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(ii) Explain how the results show which magnet is strongest.

..............................................................................................................

.............................................................................................................. 1 mark

3. Magnets

(a) Some children investigated whether or not some materials are attracted to a magnet. They made notes of their results.

Attracted to a magnet

Not attracted to a magnet

Iron nail Steel clip.

Metal coin, Chocolate, Modelling clay.

(i) Write the numbers to show the scale on the chart below. A number has been done for you.

.....

.....

.....

.....

.....

.....

Number ofmaterials

Attractedto a

magnet

Notattracted

to a magnet

1 mark

(ii) Draw a bar on the chart to show the number of materials attracted to a magnet.

1 mark

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(b) Jane wrote ‘Our investigation was good’ as her conclusion for the investigation.

Why is this not a useful scientific conclusion?

.....................................................................................................................

..................................................................................................................... 1 mark

(c) Ali and Jane describe their ideas about metals.

Jane recorded some observations from their investigation in a table.

Does each observation support their ideas? Tick ONE box on each row of the table.

Observation

Supports Ali’s and

Jane’s ideas

Supports only

Jane’s idea

Does not support

either idea

The iron nail is attracted to the magnet.

The steel clip is attracted to the magnet.

The metal coin is not attracted to the magnet.

The modelling clay is not attracted to the magnet.

The chocolate is not attracted to the magnet.

2 marks

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(d) Ali said ‘To improve our test we should have measured how far each material moved when it was attracted to the magnet’. Jane said ‘This would not improve our test’.

Why was Jane right to think this would not improve their test?

.....................................................................................................................

..................................................................................................................... 1 mark

4. Magnetic noticeboard

(a) Miya uses a magnet to hold a notice on the noticeboard in her classroom.

The board is coated in white plastic.

Tick ONE box to show which material may be under the plastic coating for the magnet to stick to the board.

steel paper

wood cork

1 mark

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(b) Miya has four magnets. She wants to measure how much force is needed to pull each magnet away from the board. The picture below shows how she carries out her test.

Write the label on the picture to name the equipment she uses to measure the force.

1 mark

(c) Miya measured the force for each magnet three times to calculate the average force.

The table below shows her results.

Magnet Average force needed to pull

the magnet away (N)

A 2

B 10

C 5

D 6

Which magnet is the strongest?

....................................................... 1 mark

John Buchan Middle School 10

(d) Miya observes that as she pulls on the magnet the force reading increases until the magnet comes away from the board.

Tick ONE box to show when Miya should take the force reading.

before she starts pulling on the magnet

just after she starts pulling on the magnet

just before the magnet pulls away from the board

after the magnet is pulled away from the board

1 mark

(e) Give ONE reason why it is better to measure the force for each magnet three times instead of just once.

......................................................................................................................

...................................................................................................................... 1 mark

Level 5

5. Exploring magnets

(a) Wayne has two bar magnets. He hangs each bar magnet from a piece of string. He holds them close together like this:

What happens to the magnets when he holds them like this?

...................................................................................................................... 1 mark

John Buchan Middle School 11

(b)

Wayne has some disc magnets on a wooden rod.

woodenrod

discmagnets

He takes the magnets off the rod. He turns some of them over, then puts all the magnets back on the rod.

Some of the magnets float.

5

4

3

2

1

Why does magnet 5 float above magnet 4?

......................................................................................................................

...................................................................................................................... 1 mark

John Buchan Middle School 12

(c) Wayne draws a diagram of the floating magnets. Part of the diagram is given below. It shows magnets 3, 4 and 5.

The North and South poles on magnet 5 are labelled.

Label the North (N) and South (S) poles on magnets 3 and 4 below.

magnet 5

magnet 4

magnet 3

N

S

1 mark

John Buchan Middle School 13

6. Measuring Forces

(a) Saida used a forcemeter to weigh different masses.

She recorded her results as a line graph.

Look at the graph.

16

14

12

10

8

6

4

2

0

0 200 400 600 800 1000 1200 1400 1600

Weight of different masses

mass in grams (g)

Weightin

newtons(N)

(i) What mass had a weight of 10 newtons?

............................... g 1 mark

(ii) What weight had a mass of 600 grams?

............................... N 1 mark

John Buchan Middle School 14

(b) Saida then made her own forcemeter using elastic bands.

She used different sized masses to make the scale.

What happens to the elastic bands when Saida hangs objects on her forcemeter?

......................................................................................................................

...................................................................................................................... 1 mark

(c) What is it that causes the force of gravity on the objects that Saida is weighing?

...................................................................................................................... 1 mark

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(d) The forcemeter measures the size of pushes and pulls.

Saida used her forcemeter to start a car moving.

Here is her table of results.

Distance moved by the car using different sized starting forces

Starting force in N

Distance moved in cm

1

18

2

52

3

140

4

235

5

316

Describe how the size of the starting force affects the distance moved by the car.

......................................................................................................................

...................................................................................................................... 2 marks

John Buchan Middle School 16

7. Separating materials

(a) Hannah mixes sand and water together. The mixture can be separated using the equipment below.

What name is given to this method of separating?

...................................................................................................................... 1 mark

(b) Explain why sand can be separated from water using this method.

......................................................................................................................

...................................................................................................................... 1 mark

(c) Hannah wants to separate some different mixtures.

John Buchan Middle School 17

Complete the table below to show how Hannah could separate each mixture quickly.

Mixture Method of separating

How is the mixture separated?

sugar and water

flour and rice

...................................

The flour .................................................

................................................................

The rice ..................................................

................................................................

steel nails and brass screws

...................................

The steel nails ........................................

................................................................

The brass screws ....................................

................................................................

4 marks