Question

Explain with the diagram how matter expands on heating and contracts cooling. (electric wires and railways tracks )​

Answer 1

Answer:

For most materials , as you heat them they expand. ... Image may contain: Human, Person, and Wiring ... In this model, solid matter is made of tiny little balls ...

Answer 2

Explanation:

Many substances expand on heating, Air & water for example since their density decreases and volume increases, hence the expansion. They start to move more slowly and get closer together so the substance contracts. All states of matter expand when heated and contract when cooled