1. Video - What are the states of matter?
Solids, liquids and gases are called the three states of matter.
The properties of solids include:
- Solids stay in one place and can be held.
- Solids keep their shape. They do not flow like liquids.
- Solids always take up the same amount of space. They do not spread out like gases.
- Solids can be cut or shaped.
- Even though they can be poured, sugar, salt and flour are all solids. Each particle of salt, for example, keeps the same shape and volume.
The properties of liquids include:
- Liquids can flow or be poured easily. They are not easy to hold.
- Liquids change their shape depending on the container they are in.
- Even when liquids change their shape, they always take up the same amount of space. Their volume stays the same.
The properties of gases include:
- Gases are often invisible.
- Gases do not have a fixed shape. They spread out and change their shape and volume to fill up whatever container they are in.
- Gases can be squashed.
5. Activity - Solid, liquid or gas?
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