This topic looks at the three states of matter and how all substances can exits as a solid, liquid or gas
Success criteria - can you…
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Describe properties of solids, liquids and gases |
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Draw and describe how the particles in a solid, liquid and gas are arranged |
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Use the particle model to explain changes of state |
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Use the particle model to describe diffusion |
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Explain gas pressure |
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Describe how the pressure of a gas can be changed |
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Skill: Accurately draw particle model diagrams |
Key words
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Word |
Meaning |
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States of matter |
The three forms in which a substance can exist – solid, liquid and gas |
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Change of state |
The process by which a substance changes from one state to another |
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Property |
A quality of a substance or material that describes its appearance or how it behaves |
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Dense |
How heavy a substance is for its volume |
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Flow |
Ability to move |
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Compress |
Ability to be squashed |
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Solid |
A substance that can’t be compressed and it can’t flow |
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Liquid |
A substance can flow but can’t be compressed |
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Gas |
A substance can flow and can also be compressed |
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Melting |
The change of state from solid to liquid |
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Evaporate |
The change of state from liquid to gas It can happen at any temperature |
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Boiling |
The change of state from liquid to gas It happens when the substance is heated |
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Condensation |
The change of state from gas to liquid |
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Freezing |
The change of state from liquid to solid |
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Melting point |
The temperature at which a substance melts |
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Boiling point |
The temperature at which a substance boils |
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Diffusion |
When particles mix with each other without anything moving them, from an areas of high to low concentration |
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Pressure |
The force caused by particles hitting the sides of a container |