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Solids, Liquids and Gases 01
When a liquid cools enough to become solid, it has frozen.

Solids, Liquids and Gases 01

Understanding matter is an important part of science. This is the first of two KS2 Science quizzes on the three states of matter - solids, liquids and gases - and it focusses on how they behave differently.

Everything is made up of matter. Matter can be in these different states: solid, liquid or gas. If you look around, you can see all sorts of objects. These are solids. Ice is solid water. You might have a drink - hopefully not near your computer! Drinks are liquids. Air is the invisible matter surrounding you. Air is a mixture of gases - oxygen and carbon dioxide for example. Steam, or water vapour, is water in the form of a gas.

Have you studied the states of matter in your science lessons at school? See how much you know about them and how they behave and by trying this Solids, Liquids and Gases quiz.

Which of these is not true of liquids?
The shape of a liquid does not change
A liquid takes the shape of its container
Liquids are runny and can be poured
The volume of a liquid does not change
The shape of a liquid changes to fit its container
Which of these is not true of gases?
Unless held in a sealed container, gases keep expanding in volume
A gas takes the same shape as its container
A gas will have the same volume as its container
Gases can be poured from one container to another
Gases always take the same shape and volume as their containers. If not held in a sealed container, a gas will keep spreading
What is the boiling point of water?
0o C
50o C
100o C
212o C
Water boils at 100o C if you live close to sea-level. If you lived at the top of a 3,048 metre mountain, your water would boil at 90o C!
Which has the most densely-packed particles?
Particles are equally dense in solids, liquids and gases
The particles of a solid are held together by strong forces of attraction
When a liquid cools enough it becomes a solid. What do we call this process?
When water (a liquid) is cold enough it freezes and turns into ice (a solid)
Which of these is not true of solids?
Solids can be cut or shaped
A solid expands to fill its container
Solids will stay the same shape and size unless acted upon by a force
Solids can be grasped (held on to)
Solids stay the same shape and size, whatever container they are in
When a solid is heated, it changes into a liquid. What do we call this process?
Ice is a solid. If you heat it, it melts and becomes a liquid (water)
What is the freezing point of water?
-55o C
-12o C
0o C
32o C
The Celsius temperature scale is based on the freezing and boiling points of water - 0o C is the freezing point and 100o C is the boiling point
When you fill a jug with sugar, it appears to have the same shape as the jug. You can also tip sugar from one container to another. Is sugar a solid, a liquid or a gas?
A liquid
A solid
A gas
A condensed gas
You can see the tiny solid crystals when you look closely at sugar
Which of these has the least densely-packed particles?
Both liquids and gases
Gases have low density, with particles moving randomly and at high speed
You can find more about this topic by visiting BBC Bitesize - Solids, liquids and gases

Author:  Sheri Smith

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