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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Checkpoint Grade 8 Unit 2 – 2.1 Solids Liquids And Gases

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Solids Liquids And Gases Checkpoint Chemistry quiz set 2: free practice for Cambridge Checkpoint (chemistry). Work through this Solids Liquids And Gases Checkpoint Chemistry quiz set 2 and get instant feedback on every answer. If you get stuck, review the 14.1 Solids liquids and gases lesson. More practice: Cambridge Checkpoint (chemistry) — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: B+
  • Time limit:
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1.
Which of these is the FIRST step in the correct order?
consider its particles
test whether it can flow
test whether it can be compressed
observe the matter
2.
Which safety precaution is most important when carrying out the ball-and-ring demonstration shown?
Dr Dabour Hub Academy - figure 1
Wear a dust mask because the ball gives off harmful dust
Keep the ball wet all the time so that it cannot expand
Hold the ball and ring by insulated handles and let them cool
Stand far away because the ball may burst when heated
3.
Hassan measured the volume of one sealed balloon at different temperatures. Using the graph, what would its volume be at 25 °C?
Dr Dabour Hub Academy - figure 2
About 2070 cm³
About 2105 cm³
About 2250 cm³
About 1930 cm³
4.
Which statement about the three states of the same substance is correct?
Attractive forces are strongest in the solid and weakest in the gas
Attractive forces are strongest in the gas and weakest in the solid
Particles in all three states are the same distance apart
Particles in the liquid are bigger than particles in the solid
5.
Which statement correctly describes particle?
anything that has mass and occupies space
forced into a smaller volume
a tiny unit used in the model of matter
move continuously and take the shape of a container
6.
Yasmin found the density of a small stone using the three steps shown. What is the density of the stone?
Dr Dabour Hub Academy - figure 3
2.7 g/cm³
0.97 g/cm³
0.37 g/cm³
874.8 g/cm³
7.
Ade heated water in a flask and recorded its mass and volume. What happens to the density of the water as it is heated?
It increases, because the volume rises as the mass stays the same
It stays the same, because the mass does not change at all
It decreases, because the water particles lose some of their mass
It decreases, because the volume rises while mass stays the same
8.
Mei measured four metal blocks. Density = mass ÷ volume. Which two blocks could be made of the same metal?
Blocks W and Z, both 50 cm³
Blocks X and Z, both over 300 g
Blocks W and Y, both 2.7 g/cm³
Blocks X and Y, both small
9.
Match each everyday observation with its particle explanation. Which pairing is correct?
Power lines sag on a hot day – metal particles move further apart
A brick sinks in a pond – its particles are lighter than water
Oil floats on vinegar – oil particles are bigger than vinegar ones
Steam fills a kitchen – water particles grow when they are heated
10.
The diagram shows a solid in its own liquid for two substances. What does it show about their densities?
Dr Dabour Hub Academy - figure 4
Solid wax is denser than melted wax, but ice is less dense than water
Both solids are less dense than their liquids
Ice is denser than water, but solid wax is less dense than melted wax
Both solids have exactly the same density as their liquids
11.
Which statement correctly describes flow?
anything that has mass and occupies space
forced into a smaller volume
move continuously and take the shape of a container
a tiny unit used in the model of matter
12.
Why is a steel nail hard to bend, while you can walk through air easily?
Strong forces hold steel particles; forces in air are very weak
Steel particles are much bigger than the particles in air
Air contains no particles, so there is nothing to push against
Steel particles move quickly, while air particles do not move
13.
Two students explain why a metal lid is easier to unscrew from a glass jar after holding it under hot water. Which explanation is best?
The metal particles get bigger, so the lid gets slightly wider
Hot water adds metal particles to the lid, making it bigger
The heat turns the solid metal into a liquid that flows off
The metal particles move further apart, so the lid gets slightly wider
14.
Which statement correctly describes matter?
a tiny unit used in the model of matter
forced into a smaller volume
anything that has mass and occupies space
move continuously and take the shape of a container
15.
Pedro says the table proves "all solids are denser than all liquids". Which is the best evaluation?
Wrong – mercury and water are denser than cork
Correct – iron and aluminium are denser than water
Correct – air is the least dense substance in the table
Wrong – air is denser than all the solids in the table
16.
A cube of iron is cut exactly in half. What happens to the density of each half?
It halves, because the mass has been halved
It doubles, because the volume has been halved
It falls to zero, because the cube shape is lost
It stays the same, as mass and volume both halve
17.
Which step comes immediately after "consider its particles"?
observe the matter
test whether it can be compressed
test whether it can flow
18.
Which statement correctly describes compressed?
anything that has mass and occupies space
a tiny unit used in the model of matter
move continuously and take the shape of a container
forced into a smaller volume
19.
An object floats in a liquid if it is less dense than the liquid. Using the table, which object sinks in fresh water but floats in very salty water?
The candle wax chip
The hen's egg
The plastic bead
None of the objects
20.
A sealed flask of air is heated. Which diagram, A to D, correctly shows the air particles after heating?
Dr Dabour Hub Academy - figure 5
A – the particles have expanded and become larger
B – heating has produced extra particles of air
D – some of the particles have been destroyed by the heat
C – same number and size of particles, moving faster
21.
Match each measurement with the best instrument to use. Which pairing is correct?
Mass of a stone – measuring cylinder of water
Volume of a sugar cube – measuring cylinder of water
Density of a liquid – thermometer and stop-clock
Volume of an irregular stone – measuring cylinder of water
22.
Chloe left a sealed jar of ice on a balance until all the ice melted. Which conclusion does her graph support?
Dr Dabour Hub Academy - figure 6
Liquid water particles are lighter than ice particles
Ice is less dense, so the mass fell as it melted
No particles were gained or lost as the state changed
The particles grew larger as they melted, but lost mass
23.
In this demonstration a brass ball passes through a ring when cool but not after heating. Which particle explanation is correct?
Dr Dabour Hub Academy - figure 7
Each particle in the ball swells up and becomes larger
Heating adds extra particles, so the ball gains mass
The particles stop vibrating and lock into a bigger pattern
The particles vibrate more and move slightly further apart
24.
Match each quantity with the unit used for it in this topic. Which pairing is correct?
Density – grams per cubic centimetre (g/cm³)
Volume – grams per cubic centimetre (g/cm³)
Mass – cubic centimetres (cm³)
Density – degrees Celsius (°C)
25.
Oliver measured the volume of a glass marble four times using water displacement. What should he do with trial 3?
Leave it out as anomalous and average the other three
Include it, because every reading must be used in the mean
Use only trial 3, because it is the most different value
Change its mass to 8.8 g so the density matches the others
26.
Using the table, which statement best explains the volume of steam?
Each steam particle is about 1670 times bigger than in water
Steam particles are much further apart, not larger
Steam has about 1670 times more particles per gram than water
Steam particles are held together by stronger forces
27.
Engineers leave small gaps between steel rails. Using the table, how much longer is the rail at 50 °C than at −10 °C?
10 mm (0.010 m)
4 mm (0.004 m)
1.4 mm (0.0014 m)
14 mm (0.014 m)
28.
A 2.0 cm³ gold ring has a mass of 38.6 g. What is the density of gold?
77.2 g/cm³
0.05 g/cm³
36.6 g/cm³
19.3 g/cm³
29.
Which practical work belongs to Solids Liquids And Gases?
Measure temperature and volume while heating water and identify patterns in results
Interpret a water-cycle diagram and connect evaporation, condensation, precipitation and run-off
Model particles physically to represent melting, freezing, evaporation and condensation
Use observations to classify materials and evaluate a particle model
30.
Which term is described as: forced into a smaller volume?
matter
particle
flow
compressed
31.
Which term is described as: a tiny unit used in the model of matter?
matter
flow
compressed
particle
32.
Which term is described as: anything that has mass and occupies space?
particle
flow
compressed
matter
33.
Match the term to its correct meaning: kinetic particle theory
the theory that all matter is made of particles that are always moving
the force per unit area produced when gas particles collide with the walls of a container
the force between particles that holds them together
how the particles are positioned relative to each other in a state of matter
34.
Which term is described as: move continuously and take the shape of a container?
matter
particle
compressed
flow
35.
A block of 60 cm³ has a density of 0.5 g/cm³, so its mass is _____.
120 g (60 ÷ 0.5)
60.5 g (60 + 0.5)
30 g (60 × 0.5)
0.008 g (0.5 ÷ 60)
36.
The density of a substance is its mass divided by its _____.
weight in newtons
volume in cm³
temperature in °C
length in metres
37.
When a solid is heated, its particles vibrate more and move _____, so the solid expands slightly.
much closer together
into a new substance
a little further apart
to become larger particles
38.
Using Ade's table, the density of the water at 80 °C is 250.0 ÷ 257.3 = _____.
1.03 g/cm³ (to 2 d.p.)
0.97 g/cm³ (to 2 d.p.)
7.3 g/cm³ (to 1 d.p.)
0.97 g (to 2 d.p.)
39.
Gas pressure is caused by particles colliding with the walls of the container. - True or false?
True
False
40.
A sealed glass flask of nitrogen gas is weighed at 15 °C, warmed to 60 °C in a water bath, dried and weighed again. The second reading will be the same as the first. True or false?
True – no gas particles entered or left the flask
False – warm gas particles are heavier, so it will read more
False – warm gas rises, so the flask will weigh less
True, but only if the flask is also made bigger
41.
Squeezing a gas into a smaller volume increases the pressure. - True or false?
True
False
42.
Hassan's graph shows the balloon got bigger when warmer. This is because the air particles moved faster and further apart; the mass of air in the balloon stayed the same. True or false?
Dr Dabour Hub Academy - figure 8
False – warm air particles are bigger, so the balloon swelled
False – the balloon gained mass as it was heated
True – spacing changed, but no particles were added
True, but only because warm particles turn into a new gas
43.
When reading the level in a measuring cylinder, you should read the bottom of the curved surface with your eye level with it. True or false?
False – you should look down from above the top of the cylinder
False – you should read the top edge where water meets the glass
True, but only when the liquid in the cylinder is coloured
True – this avoids reading the level too high or low
44.
Using the table, 10 g of ice takes up more space than 10 g of liquid water at 4 °C. True or false?
False – solids always take up less space than their liquids
True – 10.9 cm³ of ice compared with 10.0 cm³ of water
False – 10 g of ice has fewer particles than 10 g of water
True, but only because the ice particles are larger
45.
Look at Yasmin's method in the diagram. Her result would be less accurate if a large air bubble was trapped against the stone in Step 3. True or false?
Dr Dabour Hub Academy - figure 9
True – the bubble raises the level, so the volume reads too big
False – air has no volume, so a bubble cannot change the level
False – a bubble would make the balance reading in Step 1 too high
True, but only because the bubble makes the stone heavier
46.
When a substance changes from a liquid to a gas, its particles change into a different kind of particle. True or false?
True – gas particles are a new substance made by heating
True – liquid particles split into smaller gas particles
False, because liquids and gases have no particles at all
False – the same particles just move further apart
47.
Using the diagram of the two beakers, Noor says: "For every substance, the solid form is always the densest." True or false?
Dr Dabour Hub Academy - figure 10
True – Beaker 1 shows that ice is the densest form of water
False – ice floats, so solid water is less dense
True – solids are always denser, whatever the diagram shows
False, because solid wax floats on top of melted wax
48.
Particles in a liquid are close together and the attractive forces between them are weaker than in the solid form of that substance. True or false?
False – liquid particles have no attractive forces at all
True – they can move past each other
False – forces in a liquid are stronger than in its solid
True, but only for liquids that are hotter than 100 °C
49.
Using the density table of liquids and objects, the candle wax chip would sink in olive oil but float in fresh water. True or false?
False – wax is a solid, so it must sink in every liquid
False – the wax would float in olive oil and sink in water
True – 0.95 is more than 0.92 but less than 1.00
True, but only if the wax chip is cut into smaller pieces
50.
Using the density table, air is so much less dense than water because its particles are far apart with large empty spaces between them. True or false?
False – air particles are much lighter than any other particles
True – the same space holds far fewer particles
False – air is less dense because its particles are smaller
True, but only when the air is cold and still
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Part of Unit 2: Properties of materials — see every lesson and quiz in this unit.
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