Question

Very Short Answer Questions:
1. What happens when an iron rim is heated?
2. Give an example of a change caused by pressure.
3. Name one metal that expands on heating and contracts on cooling.
4. Name two brittle substances.
5. Give two examples of irreversible changes that take place due to heating
6. Give one use of expansion of an object on heating.​

Answer 1

1. iron is rusting. 2. there is a pressure in atmosphere. 3. salt and baking substances. 4.no. b.