Question

1. Explain how expansion and contraction of substances are useful to us by giving examples.

Answer 1

Answer:

Substances expand (increase in size) when they get warmer, and they contract (decrease in size) when they get cooler. This property can be useful. For example: Thermometers work because the liquid inside them expands and rises up the tube when it gets hotter.

Explanation:

Hope it helps you.