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STEM Learning
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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
Solids, liquids, gases
The relationship between energy and states of matter is sometimes difficult for students to comprehend. This activity helps to reinforce the notion that, when energy is added to a system, the molecules themselves do not change but their motion and relative positions do change.
While the model is a simplification, it helps students to understand how energy is transferred from hot places to colder places; how heating and cooling are related to changes of state; and how the molecules of a substance behave in different states.
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