Question

What is expansion?
What is contraction?
What are insulators?
What are conductors​

Answer 1

Hey!

Expansion:- it is the way through which games or any other liquid expand means increases ya volume suddenly!

Contraction:- it is the way in which any liquid /solid/gas/ refuses its volume and become less.

Insulators:- insulators are those solid which do not conduct electrical every or electricity!

Conductors:- as the name suggest, they conduct electricity form then!

Thanks!

Answer 2

Answer:

Expansion:It means expanding or becoming big in size

Contraction:It means it is joining

Insulators:It means which does not allow electricity to pass throigh it

Conductors:It means it allows electricity to pass through it