Chemistry-using chemical reactions to make new materials 0.0 / 5 ? ChemistryChemical patterns and reactivity seriesGCSEWJEC Created by: Sophie ConwayCreated on: 16-12-13 19:39 Where are raw materials obtained from? the earth,sea and air.Chemical reactions are then used to turn the raw materials into useful products 1 of 6 What do chemical reactions do? use up reactants and produce new substances called products 2 of 6 What happens to the atoms in chemical reactions? atoms are rearranged but no new atoms are produced nor are any atoms destroyed 3 of 6 What are the signs of a chemical change? colour change,formation of a precipitate,a temperature change or gas being produced 4 of 6 What are reactions in which temperature rises? Exothermic 5 of 6 What are reactions in which the temperature falls? Endothermic 6 of 6
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