physical and chemical changes

Question 1

What’s a physical property?

Answer 1

A characteristic/description of a substance that can be used to help identify it.

Question 2

What’s a chemical property

Answer 2

Describes the behavior of a substance as it becomes a new substance and it usually involves heat or acid.

Question 3

What is a quantitative property?

Answer 3

Involves a measurement (numerical value) ex- temperature, height, mass, volume, density, solubility

Question 4

What is a qualitative property?

Answer 4

Involves the 5 senses (no measurement) ex- smell, sight, hear, taste, touch

Question 5

What is a chemical change?

Answer 5

A change in the starting substance(s) and the production of 1 or more new substances.

Question 6

What is evidence of a physical change?

Answer 6

1. The substance remains the same despite maybe changing form.
2. No new substances created.
3. Change can be reversed.

Question 7

What is evidence of a chemical change?

Answer 7

1. New colour
2. Heat/light given off
3. Bubbles/gas formed
4. New odour
5. Precipitant
   + hard to reverse