Understanding Mixtures for Grade 8

Front

Definition of mixture

Back

of two or more substances not chemically combined

Front

Example: solid-solid mixture

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and salt

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Two main types of mixtures

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and heterogeneous

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Property: composition of mixtures

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proportions

Front

Mixtures vs. compounds: separation

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can be separated physically; compounds require chemical methods

Front

Separation technique for saltwater

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Evaporation

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Identifying a homogeneous mixture

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appearance throughout, e.g., air

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Using filtration

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insoluble solids from liquids, e.g., sand from water

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Planning to separate a mixture of iron filings and sulfur

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a magnet to remove iron filings

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Reasoning: Why mixtures retain individual properties

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chemical bonds formed between components