Physical and Chemical Changes

Question 1

What is physical change

Answer 1

A physical change is a change in a substance that does not change what the substance is.

Question 2

Examples of physical change are?

Answer 2

Change in shape
Change in size
Change in state of matter

Question 3

What is a chemical change?

Answer 3

A chemical change is a change in which a substance is changed into a different substance. (You’ve changed what it is)

Question 4

What are some examples of chemical change

Answer 4

Combustion
Corrosion
Tarnishing
Decomposing
Polymerisation

Question 5

What is rusting an example of Physical or Chemical change

Answer 5

Chemical

Question 6

Reactents are consumed in chemical reactions to make?

Answer 6

Products

Question 7

What are the signs of a chemical reaction?

Answer 7

-Change in colour
-Change in odour (smell)
-Precipitate (solid) forms from mixing two liquids
-Bubbles form from mixing substances
-Change in temperature