Physical And Chemical Changes

Question 1

Physical change (definiton)

Answer 1

A type of change in which the form of matter of a substance is altered but one substance is not transferred into another.

Question 2

Chemical change

Answer 2

Any change that results in new substance(s) to be formed and involves the breaking of bonds between atoms.

Question 3

Activation energy

Answer 3

Minimum amount of energy needed for particles to react