Physical and chemical changes

Question 1

What are some things that show a chemical change has taken place?

Answer 1

It produces one or more new substance.

It is an irreversible change.

Question 2

What are some things that show a physical change has taken place?

Answer 2

When a substance change shape.
When a substance change state.
When a substance breaks into pieces.
No new substances are made
It is a reversible change.

Question 3

Give an example of a chemical change.

Answer 3

Combustion,
Neutralisation,
Egg cooking.

Question 4

Give an example of a physical change.

Answer 4

Water boiling,

Ice melting.