physical vs chemical changes

Question 1

in general physical changes…..

Answer 1

create no new substances
easy to reverse
absorb or release small amounts of energy

Question 2

in general chemical changes…..

Answer 2

create new substances
difficult to reverse
absorb or release large amounts of energy

Question 3

an example of a physical change is…..

Answer 3

ice melting into water

Question 4

an example of a chemical change is…..

Answer 4

burning wood on the floor