This video zooms into solids, liquids and gases at a particle level to understand why they expand and contract with the addition or removal of heat.

This video answers the questions:
What is expansion and contraction of matter?
What is expansion and contraction of solids, liquids and gases?
What is the thermal expansion and contraction of matter?
What causes expansion and contraction?
Does matter expand and contract?
Are expansion and contraction the same?
What are examples of expansion and contraction in everyday life?
What are expansion and contraction experiments?

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