This video is about what exothermic and endothermic reactions are and how temperature changes can be used to identify which reaction is which. Exothermic reactions, in solution, give out energy ...

A presenter-led science video investigating exothermic and endothermic reactions, with Dr Maggie Aderin-Pocock and Dr Alex Lathbridge.

However, those who test positive may experience irritation at the site of the test (itching, hives, or slight pain from the scratch or needle stick). While extremely rare, these tests could ...