4. Write the various conditions favouring a chemical change.
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Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
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The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change. Challenge: food cooking, rust formation, tarnish forming on doorknobs, fuel burning for heat, tarnished penny.
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