Properties and Changes

Question 1

What is a physical property?

Answer 1

A characteristic or description of a substance.

Question 2

What are examples of a physical property?

Answer 2

Colour
Texture
Smell
Melting Point 
State

Question 3

What is a chemical property?

Answer 3

A characteristic behaviour that occurs when the substance changes into something new.

Question 4

What are examples of a chemical property?

Answer 4

Flammability
Corrosive
Oxidizer

Question 5

What is a physical change?

Answer 5

A change that does not produce a new substance.

It can be reversed.

Question 6

What are examples of a physical change?

Answer 6

Melting
Evaporation
Dissolving
Cutting

Question 7

What is a chemical change?

Answer 7

The change that a substance goes through to produce a new substance.

Question 8

What are the five pieces of evidence that a chemical change has happened?

Answer 8

1. New colour appears
2. Heat or light is produced or absorbed
3. Bubbles of gas are formed
4. A solid material (precipitate) forms in solid
5. The change is difficult to reverse.

Question 9

How can you determine which gas is produced in a chemical change?

Answer 9

Hydrogen - a burning splint brought to hydrogen will cause a popping sound

Oxygen - a glowing splint brought to oxygen will ignite a flame

Carbon Dioxide - a burning splint brought to carbon dioxide will extinguish a flame