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Knowledge Test 2 Materials and Their Properties
Place a # before every answer line
States of Matter
1. What happens during evaporation?
A gas changes to a liquid
A solid changes to a liquid
A liquid changes to a gas
2. Butter going soft and runny on a hot day is an example of
freezing
melting
condensing
3. What is the missing word? When water is...., it starts to change from a liquid to a solid.
cooled
heated
boiled
4. Clouds are formed by
rain falling
hot air rising
water vapour condensing
5. We use the same water today that dinosaurs used when they lived on the Earth. Is this true or false?
True
False
Neither
6. A gas condenses into a liquid when it is...
cooled
warmed
boiled
7. Which process is the opposite of condensation?
Melting
Freezing
Evaporation
8. Which of these statements is FALSE?
Evaporation is a change that can be reversed
Evaporation only happens at 100°C
Evaporation is helped by heat and by wind
9. The movement of water around and around our world is called...
condensation
the water cycle
evaporation
10. Which of these is NOT a part of the water cycle?
The Sun evaporates water on the Earth's surface into water vapour
The water vapour rises, and cools and condenses into clouds
When it rains, the clouds melt
Characteristics of materials
1. Why couldn't you use a plastic towel?
It would be too bendy
It wouldn't be absorbent
It wouldn't conduct heat
2. Why wouldn't you sit on a glass chair?
It might shatter
It wouldn't be absorbent
It would be transparent
3. Where do metals come from?
From rocks called ores
From fibres woven together
From trees
4. How is glass made?
By heating sand
By mashing up wood from trees
By weaving fibres together
5. How is paper made?
By heating sand
By mashing up wood from trees
By weaving fibres together
6. Metal is used for nails because it ...
rusts
is shiny
does not bend easily
7. Wood is used for matches because it ...
floats
rots
burns
8. Rubber is used for wellington boots because it ...
floats
is opaque
is waterproof
9. Which spoon is it safer to stir very hot soup with?
A metal spoon
A wooden spoon
A paper spoon
10. Material A is stretchy but not absorbent. Material B is very absorbent but does not stretch. Which makes
the best swimwear?
Material A
Material B
Both Material A and Material B make good swimwear
Gases, liquids and solids
1. Which of the following is NOT a gas?
Air
Car exhaust fumes
The sea
2. You blow up a balloon. Is it heavier or lighter than the uninflated balloon?
Heavier
Lighter
They weigh the same
3. When you squeeze a sponge under water, what are the bubbles that escape?
Pieces of sponge
Air coming from the spaces in the sponge
Water
4. Which material is a liquid?
Sponge
Shampoo
Salt
5. Which material is a solid?
Syrup
Cooking oil
Cotton wool
6. To change a solid metal to a liquid, you would
heat it
cool it
bend it
7. Which of these is NOT an example of a solid?
Dust
Runny honey
Gravel
8. Which one of these best describes a solid?
My particles are packed tightly together. I keep my shape.
My particles are loosely packed. I take the shape of my container.
My particles have lots of room. I try to spread out in every direction.
9. Which one of these best describes a liquid?
My particles are packed tightly together. I keep my shape.
My particles are loosely packed. I take the shape of my container.
My particles have lots of room. I try to spread out in every direction.
10. Which one of these best describes a gas?
My particles are packed tightly together. I keep my shape.
My particles are loosely packed. I take the shape of my container.
My particles have lots of room. I try to spread out in every direction.
Different changes
1. Which substance can dissolve completely in water?
Sand
Flour
Salt
2. Substances that dissolve in water are called
solutions
insoluble
soluble
3. How could you separate a mixture of sand and salt?
Mix with water, filter, and then evaporate
Mix with water, evaporate and then filter
Filter and then mix with water
4. Will the steam from seawater be salty?
Yes
No
Some of the steam will be salty
5. Are melting, freezing, boiling, evaporating and condensing ALWAYS reversible changes?
No
Yes
Only sometimes
6. Which of these is a reversible change?
Metal rusting
Baking a cake
Freezing orange juice to make an ice lolly
7. Which of these is an irreversible change?
Candle wax melting
Candle wax burning
Ice cream melting
8. What new materials are formed when a candle burns?
Melted wax
Water and carbon dioxide and soot
No new materials are formed
9. How could you change burnt paper back into its original form?
Cool it
Scrape off the soot
You can't
10. Which of these statements is FALSE?
Freezing is not a reversible change
Heating a substance can cause both reversible and irreversible changes
Dissolving is a reversible change
Solids and liquids
1. I can be 'got hold of'. I don't change shape when you move me. What am I?
A solid
A liquid
Neither a solid nor a liquid
2. I cannot be picked up. I take the shape of any container. What am I?
A solid
A gas
Neither a solid nor a gas.
3. Which of the following are examples of liquids?
Wood and paper
Shampoo and oil
Shoes and socks
4. Sugar and sand can be poured. Are they examples of solids or liquids?
Solids
Liquids
Neither
5. When a solid is heated, it turns into a liquid. This is called ...
dissolving
freezing
melting
6. When a liquid is cooled, it turns into a solid. This is called ...
dissolving
freezing
melting
7. Evaporation is when
a gas is cooled and changes to a liquid
a liquid is heated and changes to a gas
a solid is heated and changes to a liquid
8. Once a solid has turned to a liquid, can it be changed back to a solid again?
No, it can never be turned back into a solid
Yes, by heating it
Yes, by cooling it
9. Condensation happens when
a gas is cooled
a liquid is cooled
a solid is cooled
10. How would you stop butter melting on a hot day?
Leave it on the table
Put it in the oven
Put it in the fridge