- Volume: - how much space an object takes up
- Mass: - how much matter an object has
- Density: - how heavy an object is for its size
Weight is different to density. Weight measures the effect of gravity on an object.
We measure the states of matter using the metric system.
- Volume: - measured in litres or metre cubed
- Mass: - measured in grams
- Density: - mass divided by volume
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