Past Papers | GCE Guide

Aug 03, 2016 · Respiration may be compared with combustion – the equation is the same, but respiration occurs in a series of small reactions that do not suddenly release large amounts of heat energy. Link to 3(d) in Unit 1. (W) If not already carried out in Unit 3, learners may practically investigate and compare the amount of energy in a variety of foods. ................
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