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Things can be solid, liquid or gas. For example, water can be ice
(solid), water (liquid) or steam (gas).
In solids:
- molecules are packed together
- molecules have a regular arrangement
- molecules have strong links
Solids:
- have a fixed shape
- are not easily compressed
- do not flow (except powders)
- are useful for making solid structures
- include rock, iron, and diamond
In liquids:
- molecules are further apart
- molecules do not have a regular arrangement
- molecules have weak links
Liquids:
- have no fixed shape
- are not easily compressed
- flow easily
- are useful for making mixtures
- include water, petrol and orange juice
In gases:
- molecules move off in all directions
- molecules do not have a regular arrangement
- molecules have no links
Gases:
- have no fixed shape
- are easily compressed
- flow easily
- are useful for burning
- include oxygen, carbon dioxide, steam and methane
The state of the examples given is as we would find them at normal
room temperature.
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