unit 16
Explain how to separate solid particles of different sizes by sieving.
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Explain how to separate insoluble solids from liquids by filtering or decanting.
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Explain how to recover dissolved solids by evaporating the liquid from the solution.
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Understand that we can decide how mixtures might be separated using knowledge of solids, liquids and gases.
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unit 17
Recognizes that some substances can change from one state to another when heated or cooled.
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Describe the changes that occur during changes of state.
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Know that a substance has characteristic properties, eg. boiling point and melting point.
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Explain how the temperature of water changes as it is heated until it reaches its boiling point.
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