Chemical Reaction - Always results in the formation of a new substance, Melting - When a solid turns into a liquid, Endothermic - A reaction in which heat is taken in, Colour - A ______ change is a sign of a chemical reaction, Condensation - When a gas turns into a liquid, Physical Change - A change in which no new substance is formed, Exothermic - A reaction in which heat is given out, Nitrogen - The element, along with magnesium, which forms magnesium nitride,

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