chemical change - a type of change that is not reversible, physical change - a reversible change, element - a substance that contains only one type of atom, compound - a substance made of two or more type of atom, chemical equation - way of describing a chemical reaction with chemical formulas, chemical formula - tells us the composition of elements in a substance, oxide - type of substance formed when an element reacts with oxygen, combustion - a chemical reaction where a fuel reacts with oxygen , chemical reaction - change in which a new substance is formed strating from one or more substances, carbonate - type of compound containing carbon and oxygen, neutralisation - chemical reaction between an acid and a base or alkali, exothermic - a reaction where energy is released as heat, squeaky pop test - test used to identify hydrogen gas, lime water - substance used to test the presnce of carbon dioxide, explosive - a chemical reaction that takes place very quickly and releases a lot of energy,

chemical reactions year 7

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