Endothermic and Exothermic Reactions

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

What are endothermic and exothermic reactions?
An exothermic reaction gives off energy to the surroundings; like a fire giving off heat. An endothermic reaction takes in energy from the surroundings; like a snowman melting.
Exothermic reactions transfer energy to the surroundings, and this energy is usually heat energy, they cause the surroundings to heat up. Just like a bonfire keeping everyone warm.

Endothermic reaction
Vinegar and baking soda reaction. A thermometer is used to measure if it is endothermic or exothermic.

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