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2.2
Energy
| Question | Answer |
|---|---|
| Energy | the capacity to do work |
| Chemical reaction | the process by which one or more substances change to produce one or more different substances |
| reactant | a substance or molecule that participates in a chemical reaction |
| product | a substance that forms in a chemical reaction |
| metabolism | the sum of all chemical processes that occur in an organism |
| activeation energy | the minimum amount of energy required to start a chemical reaction |
| catalyst | a substance that changes the rate of a chemical reaction withough being consumed or changed significantly |
| enzyme | a type of protein or RNA molecule that speeds up metabolic reactions in plant and animals without being permanently changed or destroyed |
| redox reaction | a reaction in which electrons are transferred between atoms; also known as an oxidation-reduction reactionq |
| oxidation reaction | a chemical reaction in which a reactant loses one or more electrons such that the reactant becomes more positive in charge |
| reduction reaction | a chemical change in which electrons are gained, either by the removal of oxygen, the addition of hytrogen or the addition of electrons |
Created by:
BarbaraC16