Physical and Chemcial change Flashcards
1
Q
Stucture of solids
A
- Have a definite shape
- Don’t flow
- Virtually impossible to compress
- Expand if heated
2
Q
Structure of liquids
A
- No definite shape
- Flow to take shape of container
- Virtually incompressible
3
Q
Structure of gases
A
- No fixed shape
- Spread or diffuse completely to fill container
- Easily compressed
4
Q
How to tell physical change
A
- Change in shape or form
- Expansion or contraction
- Change in state
- Mixing substances together
5
Q
How to identify new substances
A
- Change in colour
- Gas or bubbles
- Formation of a solid
- Lighty / temp change
6
Q
Examples of chemical change
A
- Burning paper
- Leaves changing colour
- Dying hair
7
Q
Indications that there is a chemcial change in gas
A
- Bubbles
- A new smell
- Smoke
8
Q
Explain how particles move when heated
A
The vibrations increase, therefore the particals are pushed apart and cause an expansion.
9
Q
What happens in physical change?
A
No new substances are formed, all changes can be reversed
10
Q
Melting
A
Solid to liquid
11
Q
Evaporation
A
Liquid to gas
12
Q
Condensation
A
Gas to liquid
13
Q
Freezing
A
Liquid to solid
14
Q
Explain how particles move when cooled
A
The vibrations decrease and the particles get closer togther, causing it to contract.
