SCIENCE chpt 14 physical + chemical change

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7 Terms

1
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physical change

matter changes shape or state but no new substance is formed

2
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chemical change

a new substance is formed like all chemical reactions

3
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info physical change

no new substance is formed + easy to reverse

4
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info chemical changes

new substance is formed + not easy to reverse

5
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chemical reactions

called reactants the new substance that is formed are called products

6
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signs chemical reactions

change in colour, change in temperature, production of light, emission of sound, distinctive smell + bubbles of gas being produced

7
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law of conservation of mass

states that matter cannot be created or destroyed but can change from one form to another