Properties & Changes of Substances

Question 1

What is chemistry?

Answer 1

The study of substances; what they are, what they do, what they’re used for, etc.

Question 2

What is a physical property?

Answer 2

A description of a substance such as colour, smell, taste, density, boiling point, etc.

Question 3

What is a chemical property?

Answer 3

A description of how a substance reacts when mixed with other substances (such as oxygen, acid, etc)

Question 4

What is a physical change?

Answer 4

A change in a substance that does not create a new substance.

Question 5

What is a chemical change?

Answer 5

A change in a substance that creates a new substance, which has it’s own properties.

Question 6

What type of change is sugar dissolving in water?

Answer 6

Physical

Question 7

What type of change is ice melting?

Answer 7

Physical

Question 8

What type of change is cooking an egg?

Answer 8

Chemical

Question 9

What type of change is a rusting nail?

Answer 9

Chemical

Question 10

What are the 5 pieces of evidence that a chemical change has occurred?

Answer 10

1. A new colour
2. Bubbles formed (new gas)
3. Heat or Light given off
4. A new precipitate forms
5. A new odour is made