During a unit on density, pupils ponder whether or not temperature affects this property. By carefully inserting blue cold water and yellow hot water into a room-temperature sample, they will see the answer. Make sure to have done the preceding lessons so that learners already know that liquids layer according to density. 

Concepts

thermal energy, energy, density, heat, liquids

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Additional Tags

density, heat, thermal energy, liquid, science

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Pros

• Fits nicely into this point in the unit investigation on density
• Beautiful and comprehensive teacher's materials are provided in the lab manual
• An engaging and very visual demonstration of concepts

Cons

• None