three states of matter


melting point

melting and freezing take place at the melting point

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boiling point

boiling and condensing take place at the boiling point 

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particle model

the three states of matter can be represented by a simple this , particles are represented by small solid spheres .

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particle theory

can help to explain changes of state using the movement of particles and the average distance between them .

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changing from a solid to a liquid 

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changing from a liquid to a gas 

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changing from a liquid to a solid 

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changing from a gas to a liquid 

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changing state

energy is needed to change from solid to liquid (melting) and from liquid to gas (boiling)

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