Chemical Change - Process where substance(s) are changed into new and different substance(s)., Physical Properties - The characteristics of a substance that can be observed or measured without changing the identity of the substance, Chemical Properties - The characteristic ability of a substance to react to form new substances, Colour Change - During a chemical reaction, the rearrangement of atoms may cause some to move to different energy levels, changing the wavelengths of light the substance absorbs, Precipitation - production of a solid form during a chemical change., Temperature - Endothermic reactions usually cause a _____________________________ change., Gas Produced - Often observed through the formation of bubbles., Light - Fireworks create __________ which is why they can be seen at night., Odour - A smell is given off during a reaction., New substance - a change of substance into another with different properties.,

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