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When a smell spreads, particles move away from where they originated. This is called diffusion.
Solids Liquids and Gases 01
Solids, liquids, and gases are the three main states of matter. Each state behaves differently because of the way its particles are arranged and move.
1 .
If matter has energy taken away .......
It contracts
It expands
It vaporises
Nothing happens
As matter is cooled down, the particles move more slowly and therefore can pack closer together
2 .
Which of these statements about solids is true?
They can be compressed easily
They do not flow
They have no definite volume
They take the shape of their container
The particles are fixed in place so the shape of a solid object does not change unless something is done to it e.g. it is hit with a hammer
3 .
When a smell spreads, particles move away from where they originated. This is called .......
Condensation
Diffusion
Dispersion
Evaporation
It takes a while for the smell to spread because the 'smelly' particles collide with particles of the air and travel around in random directions
4 .
Which is the most dense substance in this list?
Aluminium
Lead
Oxygen
Water
The most abundant metal in the Earth's crust is aluminium. Aluminium is a low density metal
5 .
When a solid changes to a liquid, it .......
Boils
Condenses
Freezes
Melts
Ice melts at 0°C
6 .
The state of matter which has very low density is .......
Gas
Liquid
Solid
Solution
Hydrogen is the gas with lowest density
7 .
When a gas changes to a liquid, it .......
Boils
Condenses
Melts
Sublimes
If a gas has energy taken away (is cooled) the particles slow down
8 .
Which will have the highest boiling point?
Distilled water
Pure water
Salty water
Tap water
Pure water boils at 100°C, adding salt makes it boil at a slightly higher temperature. The exact temperature depends on the amount of salt added
9 .
If you reduce the volume of a gas .......
It expands
It gets bigger
The pressure increases
The temperature falls
The gas particles are moving at the same speeds as before but there are more of them in a smaller space
10 .
A balloon is filled with gas. Inside the balloon the gas particles .......
Are avoiding each other
Are moving slowly
Are moving very quickly
Are not moving
The particles in a gas are moving a lot faster than those in a liquid or solid
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