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Unit 1
Terms and Definitions
9
Biology
12th Grade
02/08/2010

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Cards

Term
Ionic Bond
Definition
An electrical attraction between two oppositely charged atoms.
Term
Law of Conservation of Matter
Definition
Matter cannot be created or destroyed.
Term
Exothermic
Definition

-Products have lower energy than reactants

-Releases energy as heat

Term
Endothermic
Definition

-Products have higher energy than reactants

-Absorbs heat

Term
Catalyst
Definition
Reduces the amount of activation energy needed for a reaction to start.
Term
Enzymes
Definition

-A biological catalyst that speeds up the rate of reactions to make them more efficient.

-Can be used over and over

Term
Decomposition Reactions
Definition
Reactions that involve the breaking down of compunds.
Term
2 Types of Matabolism
Definition
Catabolic and Anabolic
Term
Catabolic Reactions
Definition
Occur when large chemical compounds are broken down into smaller compounds.
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