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Topic 6 Lesson 2 Voc
Question | Answer |
---|---|
A change that alters the form or appearance of a material but does not make the material into another substance. | physical change |
A change in which one or more substances combine or break apart to form new substances. | chemical change |
A substance that enters into a chemical reaction. | reactant |
A substance formed as a result of a chemical reaction. | product |
A reaction that releases energy, usually in the form of heat. | exothermic reaction |
A reaction that absorbs energy. | endothermic reaction |
How slowly or quickly something happens. | rate |