SCIENCE (CHEMICAL AND PHYSICAL CHANGES)

Question 1

Characteristics of physical change

Answer 1

-No new products are created
-They can be easily reversed
-Does not create new bonds between atoms
-Substance before and after the change is the same

Question 2

Characteristics of chemical change

Answer 2

-New products are made
-Chemical bonds are being created/destroyed

Question 3

5 observations that could provide evidence of a chemical change.

Answer 3

-Change in colour
-Odour is detected
-Change in temperature
-Bubbles appear
-Precipitation appears in liquid/gas
-Production of gas

Question 4

Classify chemical change in an experiment.

Answer 4

Colour change, temperature change, gas production

Question 5

Classify physical change in an experiment.

Answer 5

Change in shape or size, Change in state of matter, Ability for reversibility