Heat and Temperature

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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Temperature vs Heat
Internal energy is the total amount of kinetic energy and potential energy.

Temperature is proportional to the average kinetic energy of a molecular’s translation motion. It is measured in °C, °F or K.

Heat is the energy transfer that occurs when two substances are in thermal contact and have differing temperatures. It is measured in Joules (J).

Measuring Temperature
When the degree of hotness - or temperature - of something goes up, its molecules go faster and it expands. This expansion can therefore be used to measure temperature itself. A device which does this is called a “hotness-meter” or thermometer. On the Celsius scale thermometer, the level to which mercury contracts at the freezing point of water is labelled 0 °C, and the level to which mercury expands at the boiling point of water is labelled 100 °C.

Fool Your Senses
Relative temperature felt by your hands

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