| Subject:
Primary Science
Year: 5
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| Strand 3: Natural and Processed Materials
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Substrand: "5.5 Solubility"
(20 periods)
Substances in nature are either a single pure substance, or a mixture of more than one substance. Some substances can dissolve to form solutions, others do not dissolve thus, form a suspension in the liquid. Mixtures form when two or more substances are mixed without any chemical change. Mixtures can be separated using mechanical or physical methods, e.g. Evaporation, filtration, sedimentation and decanting. A solution forms when a substance in the solid state (the solute) dissolves (disappears) in a liquid (the solvent).
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| General Learning Outcomes | Specific Learning Outcomes | Suggested Assessment Events |
Learner's should:
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Learner's should:
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Learner's should:
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5.5.1 understand the terms mixture, soluble, insoluble, solute, solvent, solution, suspension (u)
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5.5.1.1 list some examples of substances that dissolve in water and some that do not
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5.5.2 know that a mixture contains two or more pure substances (k)
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5.5.2.1 prepare mixtures from pure substances
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5.5.3 know some methods for the separation of mixtures, e.g. filtration, decanting, sieving, evaporation (k)
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5.5.3.1 apply the different mixture separating methods e.g. filtration, decanting, sieving and evaporation
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5.5.4 apply the appropriate method for separation of given mixtures (s)
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5.5.4.1 sieve a mixture of sand particles and small stones
5.5.4.2 evaporate a mixture of salt and water
5.5.4.3 filter a mixture of chalk particles and water
5.5.4.4 decant a suspension
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