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Science questions, unit 8
Nama / NameKelas / ClassTarikh / Date

Matter

45 marks. Use Practice to check each answer as you go, or Exam to answer everything first. Ask a grown-up to help you mark the written answers.

Section A: objective questions

10 marks
Choose the best answer for each question.
1

Question 1

Which of these is matter in the gas state?
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B
The wind is moving air, which is a gas. Sand and a paper clip are solids and seawater is a liquid.
For the teacher: Remembering, low difficulty, standard 8.1.1
Textbook p. 178
2

Question 2

What is matter?
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C
Matter is any substance that has mass and occupies space. Solids, liquids and gases are all matter.
For the teacher: Remembering, low difficulty, standard 8.1.1
Textbook p. 178
3

Question 3

Coloured water is poured from a beaker into a conical flask and then into a cup. Which property of the water does not change?
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A
A liquid has a fixed volume, so its volume stays the same. It has no fixed shape, so its shape changes to fit each container.
For the teacher: Understanding, low difficulty, standard 8.1.3
Textbook p. 181
4

Question 4

Diagram 1 shows the water level in a measuring cylinder before and after a small stone is put in. What is the volume of the stone?
Two measuring cylinders: water at 40 mL before and 62 mL after the stone is added
Diagram 1
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D
Volume of stone = 62 mL − 40 mL = 22 mL.
For the teacher: Applying, medium difficulty, standard 8.1.3
Textbook p. 180
5

Question 5

Diagram 2 shows the arrangement of particles of matter in three containers, P, Q and R. Which one shows a liquid?
Three circles of particles: P has few particles far apart, Q has particles tightly packed in rows, R has particles less packed and not in order
Diagram 2
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B
In a liquid the particles are less packed and not in an orderly way, as in R. P is a gas and Q is a solid.
For the teacher: Understanding, low difficulty, standard 8.2.1
Textbook p. 187
6

Question 6

Ice cream changes into liquid in the hot sun. Which process is this?
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C
A solid that gains heat and becomes a liquid is melting.
For the teacher: Remembering, low difficulty, standard 8.2.1
Textbook p. 186
7

Question 7

In which change does water lose heat to the surrounding?
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C
Melting, boiling and evaporation gain heat. Freezing and condensation lose heat. Of the four, only condensation is a loss.
For the teacher: Understanding, low difficulty, standard 8.2.2
Textbook p. 191
8

Question 8

Wet clothes on a clothes line are dry after four hours. Which process makes the clothes dry?
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D
The water in the clothes gains heat from the surroundings and changes into water vapour. This is evaporation.
For the teacher: Applying, low difficulty, standard 8.2.4
Textbook p. 198
9

Question 9

Diagram 3 shows the processes that change the state of matter of water. Ice cubes become water. Which letter shows this change?
Solid, liquid and gas boxes with arrows labelled P (solid to liquid), Q (liquid to gas), R (liquid to solid) and S (gas to liquid)
Diagram 3
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A
Ice is a solid and water is a liquid. Solid to liquid is arrow P, which is melting.
For the teacher: Analysing, medium difficulty, standard 8.2.2
Textbook p. 191
10

Question 10

Hana says, "Boiling and evaporation are the same because both change water into water vapour." Which statement is the best reply?
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B
Both processes change a liquid into a gas by gaining heat, but boiling happens at the boiling point only, 100 °C for water.
For the teacher: Evaluating, high difficulty, standard 8.2.1
Textbook p. 187

Section B: structured questions

35 marks
Answer all questions. Circle the answer or write it in the space.
11

Question 11

Diagram 4 shows children at the beach. Name the state of matter of each thing.
A beach scene with children building a sandcastle, playing in the sea and flying kites
Diagram 4
[1 mark] (a)Sand
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Solid
[1 mark] (b)Seawater
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Liquid
[1 mark] (c)Wind
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Gas
For the teacher: Remembering, low difficulty, standard 8.1.1
Textbook p. 178
12

Question 12

Solid, liquid and gas are the three states of matter.
[2 marks] (a)State two properties that all three states of matter have in common.
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Tick each point you got.
[2 marks] (b)Why can a liquid be poured into containers of different shapes but its volume stays the same?
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 8.1.5
Textbook p. 183
13

Question 13

A pupil wants to find the volume of a small stone. Diagram 5 shows the water level before and after the stone is put in.
Two measuring cylinders: water at 30 mL before and 58 mL after
Diagram 5
[2 marks] (a)Calculate the volume of the stone.
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Tick each point you got.
[1 mark] (b)The pupil presses the stone hard with her hand. Does its shape change?
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No
A solid has a fixed shape.
For the teacher: Applying, medium difficulty, standard 8.1.3
Textbook p. 180
14

Question 14

Diagram 6 shows the arrangement of particles of matter in three containers, P, Q and R.
Three circles of particles P, Q and R
Diagram 6
[1 mark] (a)Which container shows a solid?
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Q
[1 mark] (b)Which container shows a gas?
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P
[2 marks] (c)Describe the arrangement of the particles in container R.
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 8.2.1
Textbook p. 187
15

Question 15

Answer each question. For (a) to (c), choose the process involved in the situation.
[1 mark] (a)Ice cubes in a glass of water become smaller.
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Melting
[1 mark] (b)A wet floor becomes dry after 20 minutes.
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Evaporation
[1 mark] (c)Dew forms on leaves in the morning.
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Condensation
[1 mark] (d)Does the water gain or lose heat when it freezes?
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Loses heat
For the teacher: Applying, low difficulty, standard 8.2.4
Textbook p. 198
16

Question 16

Study Diagram 7.
Solid, liquid and gas boxes with arrows labelled P, Q, R and S
Diagram 7
[1 mark] (a)Name the process P.
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Tick each point you got.
[1 mark] (b)Does water gain or lose heat in process R?
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Loses heat
R is liquid to solid, which is freezing. Freezing loses heat.
[1 mark] (c)Water vapour changes into water droplets on the outside of a cold glass. Which letter shows this?
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S
For the teacher: Analysing, low difficulty, standard 8.2.2
Textbook p. 191
17

Question 17

Diagram 8 shows the natural water cycle.
Water cycle with four numbered arrows: 1 water rising from the sea, 2 vapour going to the cloud, 3 rain falling, 4 water flowing back
Diagram 8
[1 mark] (a)Name the process at 1.
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Tick each point you got.
[1 mark] (b)Name the process at 2 that forms clouds.
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Tick each point you got.
[1 mark] (c)Why does the water vapour change into water droplets at 2?
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Tick each point you got.
[1 mark] (d)State one reason why the natural water cycle is important.
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Any 1 points
Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 8.2.3
Textbook p. 192
18

Question 18

Fatimah does an activity called "raining in a glass container". She pours hot salt water into a glass container, puts a small clear plastic container in the middle, covers the top with plastic food wrap and puts ice cubes on top. After 10 minutes, water collects in the small plastic container.
[2 marks] (a)Name the two processes involved.
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Tick each point you got.
[1 mark] (b)What is the state of matter of the water that collects in the small plastic container?
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Liquid
[1 mark] (c)Why are the ice cubes placed on top of the plastic wrap?
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Tick each point you got.
For the teacher: Applying, medium difficulty, standard 8.2.4
Textbook p. 194
19

Question 19

In the story of Mr Ice (Diagram 9), Mr Ice disappears under the hot sun. Mr Rock thinks Mr Ice has gone for ever.
Comic strip: Mr Ice melts in the sun and becomes water vapour
Diagram 9
[1 mark] (a)Why did Mr Ice melt?
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Tick each point you got.
[1 mark] (b)Name the process that changed the water into water vapour.
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Tick each point you got.
[1 mark] (c)Is Mr Rock right that Mr Ice has gone for ever?
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No
The water vapour is still there in the air. It is the same matter in a different state.
For the teacher: Evaluating, medium difficulty, standard 8.1.4
Textbook p. 184
20

Question 20

Zul wants to show that water vapour condenses into water. He has a glass, ice cubes and water.
[2 marks] (a)Describe a simple activity he can do.
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Any 2 points
Tick each point you got.
[1 mark] (b)What will he observe?
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Tick each point you got.
For the teacher: Creating, high difficulty, standard 8.2.4
Textbook p. 190