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Unit 5 State of matter (Jasmine, but a lot of them by Curtis and Ken) -…
Unit 5 State of matter (Jasmine, but a lot of them by Curtis and Ken)
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Changing state
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Evaporation
A puddle of water will gradually disappear as it changes to water vapour, an invisible gas. This is called evaporation. Warmer water evaporates more quickly.
If you heat water until it's temperature reaches 100 celsius, it will boil. Now all of the water changes rapidly to steam. 100 celsius is the boiling point of water.
Condensation
If the water vapour or steam, touches something cold, it condenses and changes back into liquid water. This is called condensation.
Freezing
If you place liquid water in the freezer, it freezes and becomes ice.
These changes are known as changes of state.
Particle theory
Solids
Solid particles do not move. When they are hitt, the particles in the solid will vibrate instead of moving like particles in water and gases. The particles in solids are the most not free ones.
Liquids
Liquid particles touch each other. The particles held together weakly, and they takes shape the container they're in. So that means that they do not have their own shape.
Gases
Gas particles do not touch each other, they move very freely and long apart.
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