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Alkali metals
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Alkali metals

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An overview of alkali metals, their properties and reactions. Can be used as a lesson, with practical or using suggested link. Reviews alkali metals and equations.
Investigating how cooling rate affects the size of crystals
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Investigating how cooling rate affects the size of crystals

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In this activity, you are going use a substance to model molten rock. When it cools it forms crystals, in a similar way to cooling rock but over much shorter timescales. Students explore the purpose of the experiment to see if there is a link between rate of cooling and crystal size formed. Using ideas, example results tables and writing frames students can use scientific method to work through the practical write up.