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Batteries use a chemical reaction to do work on charge and produce a voltage between their output terminals. The basic element is called an electro chemical cell and makes use of an oxidation/reduction reaction. An electro chemical cell which produces an external current is called a voltaic cell.

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cooking brings about chemical changes in food. The texture and taste changes when food is cooked. Baking powder contains sodium hydrogen carbonate. This breaks down when heated, releasing carbon dioxide that helps cake mixtures to rise during baking.

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Carbonation is the process of carbon dioxide naturally dissolving into a solution of water under pressure. It is usually found through the creation of soda, tonic water, bottled water, and alcoholic beverages.

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The stars contained within the rocket body contain the metal powders or salts that give the firework its colour. They will often be coated in gunpowder to aid in ignition. The heat given off by the combustion reaction causes electrons in the metal atoms to be excited to higher energy levels.

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Your body is made up of chemical compounds, which are combinations of elements.Your body is mostly water, made up of hydrogen and oxygen.

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A process that involves rearrangement of molecular or ionic structure of a substance, as small as a change in physical form to a nuclear reaction!