Science Chapter Seven
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Created by:
carlislesandy on February 25, 2010
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12 terms
Terms | Definitions |
|---|---|
 Chemical Reaction: | produces new substances by changing the way in which atoms are arranged. |
| Reactant: | Bonds are broken. The substances present at the beginning of a chemical reaction. |
| Products: | the substances formed by a chemical reaction. |
| Precipitate: | a solid formed in a chemical reaction. |
| Catalyst: | substance that increases the rate of a chemical reaction but is not itself consumed in the reaction. |
| Law of Conservation of Mass: | states that in a chemical reaction atoms are neither created nor destroyed. |
| Coefficients: | indicate how molecules take part in the reaction. |
| Exothermic Reaction: | a reaction in which energy is released. |
| Endothermic Reaction: | a reaction in which energy is absorbed. |
| Bond energy: | the amount of energy in a chemical bond between atoms. |
| Photosynthesis: | plants absorb energy from sunlight to turn carbon dioxide and water into oxygen and glucose (nutrition). |
| Respiration: | the "combustion" of glucose to obtain energy. |
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