C1.1.2 - Chemical and physical changes Flashcards
1
Q
What is a physical change?
A
A physical change halogens when a substance changes state or shape or breaks into pieces but no new substances are made
2
Q
Can physical changes be reversed?
A
Yes, many of them can be reversed
3
Q
What are some examples of physical changes?
A
- freezing juice to make an ice lolly
- mixing sand with water
- dissolving sugar in water
4
Q
What is a chemical change?
A
It is a change that produces one or more new substances
5
Q
What are some examples of chemical changes?
A
- cooking eggs, cakes and other food
- steel rusting
- am acid reacting with an alkali to make a salt and water
6
Q
What happens to particles in physical changes?
A
The particles stay the same but their arrangement and movement change
7
Q
What happens to particles in chemical changes?
A
The particles break up and then join together in different ways
