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2-2 Energy
| term | definition |
|---|---|
| energy | ability to do work and cause change |
| chemical reaction | one or more substances change to produce one or more different substances |
| reactant | elements and compounds that change in some way (react) during a chemical reaction |
| product | elements and compounds that instiate a chemical reaction |
| metabolism | describes all of the chemical reactions that occur in an organism |
| activation energy | amount of energy needed to start a chemical reaction |
| catalyst | chemical substances that reduce the amount of activation energy that is needed for a reaction to take place |
| enzyme | protein or RNA molecule that speeds up metabolic reactions without being permanently changed or destroyed |
| redox reaction | reactions in which electrons are transferred between atoms (oxidation reduction reactions) 2 types >> |
| oxidation reaction | reactant loses one or more electrons thus becoming more positive in charge |
| reduction reaction | reactant gains one or more electrons, thus becoming more negative in charge |