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Biology Molecules
n/a
25
Biology
9th Grade
11/09/2010

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Term
Chemical Reaction
Definition
when a substance changes to produce another
Term
Metabolism
Definition
the sum of all chemical processes that occur in an organism
Term
Activation Energy
Definition
the minimum amount of energy required to start a chemical reaction
Term
Catalysts
Definition
the acceleration of a chemical reaction by a catalyst, they reduce activation energy
Term
Enzyme
Definition
acts as a catalyst in biochemical reactions
Term
Redox Reaction
Definition
reaction where electrons are transferred between atoms, or an oxidation reaction
Term
Oxidation Reaction
Definition
reaction where one or more electrons are lost
Term
Reduction Reaction
Definition
reaction where electrons are gained
Term
Polar
Definition
a molecule where the positive and negative charges are separated
Term
Hydrogen Bond
Definition
attractive force when combined atoms attract with another set of two electrons
Term
Cohesion
Definition
the force that holds molecules of a single material together
Term
Adhesion
Definition
the attractive force between two bodies of different substances that are in contact with each other
Term
Capilary
Definition
attraction between liquid molecules that causes them to rise in small tubes
Term
Solution
Definition
a mixture where a substance(s) are uniformly dispersed
Term
Solute
Definition
the substance that dissolves in the solvent
Term
Solvent
Definition
the substance in which the solute dissolves
Term
Concentration
Definition
the amount of a substance
Term
Saturated Solution
Definition
a solution that cannot dissolve
Term
Aqueous Solution
Definition
a solution in which water is the solvent
Term
Hydroxide Ion
Definition
OH-
Term
Hydronium Ion
Definition
H3O+
Term
Acid
Definition
compound that increases the hydronium ions when in water
Term
Base
Definition
compound that increases the number of hydroxide ions when in water
Term
Base
Definition
compound that increases the number of hydroxide ions when in water
Term
Buffer
Definition
neutralizes acids and/or bases
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