unit d chapter 3 vocabulary words
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12 terms
Terms | Definitions |
|---|---|
 chemical reaction | the process by which chemical changes occur. in a chemical reaction, atoms, are rearranged, and chemical bonds are broken and formed |
| reactant | a molecule which enters into a chemical reaction |
| product | the compounds that are formed when a reaction goes to a completion |
| precipitate | an insoluble product of chemical reaction |
| catalyst | a substance that speeds up a chemical process without actally changing the products of reaction |
| law of conservation of mass | the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes |
| coeffient | tindicate how many molecules take part in the reaction |
| bond energy | the energy required to break a bond |
| exothermic energy | a chemical reaction that releases heat |
| endothermic reaction | a chemical reaction that takes up heat |
| photosynthesis | the process by which a cell captures energy in sunlight and uses it to make food |
| respiration | the process by which cells obtain energy from glucose |
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