Topic C3 science revision
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1
What are the three most common 'states of matter'?
Solid, liquid and gas
2
What is the 4th state of matter?
Plasma
3
What is the name for an area containing no particles at all?
A vacuum
4
If a substance is a gas at room temperature, what type of substance is it?
Molecular
5
How are molecules arranged in a gas?
Moving quickly and using as much space as possible
6
Can a gas be compressed?
Yes
7
How are atoms arranged in a solid giant substance?
Close together, in fixed positions and in a regular pattern
8
What will happen if you heat up a solid?
It will melt
9
What happens to the chemical bonds when a giant substance is heated up?
They are broken
10
How are atoms arranged in a liquid giant substance?
They are no longer bonded to other atoms but still touching each other
11
How are atoms arranged in a gaseous giant substance?
They are separate from each other
12
How are molecules arranged in a molecular gas?
They are far away from each other
13
How are molecules arranged in a molecular liquid?
They are touching each other
14
What are forces between molecules called?
Intermolecular forces
15
How are molecules arranged in a molecular solid?
The molecules are held in place in a repeating pattern
16
What does RTP stand for?
Room temperature and pressure
17
What is room temperature?
25ºC
18
What is needed to change a solid into a liquid?
Energy
19
What is the temperature at which a solid turns into a liquid called?
Melting point
20
What is the shorthand for melting point?
mpt
21
Will molecular substances have high or low melting points?
Low
22
Will giant substances have high or low melting points?
High
23
What happens when a liquid is allowed to cool down below its melting point?
It freezes
24
What happens to the temperature of the surroundings when a solid melts?
It drops
25
What is the melting point of water?
0ºC
26
What is it called when a liquid turns to a solid?
Freezing
27
What happens to the temperature of the surroundings when a liquid turns into a solid?
It increases
28
What happens when we heat a liquid up?
It boils
29
What is the boiling point of water?
100ºC
30
What is the change of state from liquid to gas called?
evaporation
31
What is the change from gas to liquid called?
condensing
32
What is the temperature where a liquid turns into a gas called?
Boiling point
33
What is the temperature where a gas condenses to a liquid called?
Boiling point
34
What is shorthand for boiling point?
bpt
35
What happens to the temperature of the surroundings when a liquid boils?
It decreases
36
What happens to the temperature of the surroundings when a gas condenses?
It increases
37
What is temperature a measure of?
Average energy of molecules
38
What is the main difference between a solid, liquid and a gas?
The amount of internal energy that the molecules or atoms have
39
What is sublimation?
The change from a solid to a gas
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