Very Short Answer Questions:
. What happens when an iron rim is heated?
1. Give an example of a change caused by pressure.
3. Name one metal that expands on heating and contracts on cooling.
+ Name two brittle substances.
5. Give two examples of irreversible changes that take place due to heatin
5. Give one use of expansion of an object on heating.
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Answer:
When iron or steel is heated with a forge or fire it expands, if a flat band ofiron or steel is made into a hoopshape, the hoop will also expand whenheated. The hoop is made just slightly smaller than the wooden wheel, themetal hoop is then heated, it then greatly expands and can be placed around the wheel.
Explanation:
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