The three blocks have the same volume but different masses, meaning their densities are different. The blocks have varying masses even though the same size because density depends on how tightly or loosely particles are packed together in the material.

1. Different densities
The three blocks have the same volume but
they have different masses. This means that
their densities are different.
1 Which block is heaviest?
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2 Which block is lightest?
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3 Fill in the box to show the particles in a solid.
4 Try to explain why the blocks have different
masses even though they are the same size.
Draw diagrams if it helps you to explain.
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2. Particles concept map