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Chapter 6 Vocab Words for final
Mr. Hobbs Vocab Words for final
9
Science
7th Grade
06/13/2010

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Term
Species
Definition
a group of same organism that can mate and reproduce
Term
Evolution
Definition
the gradual change in species over time, to adapt better to their environment
Term
Adaptation
Definition
 A trait that helps an organism survive and reproduce, each species is well suited to the life it lives
Term
Natural Selection
Definition
the process by which individuals that are better adapted to their environment are likely to survive and reproduce than other members of the same species
Term
Variation
Definition
any  difference between individuals of the same species
Term
Gradualism
Definition
Tiny changes in species that gradually add up to major changes over very long periods of time
Term
Fossil record
Definition
the millions of fossils the scientists have collected
Term
Punctuated Equilibrium
Definition
the theory that species evolve during a short periods of rapid change
Term
Branching tree
Definition
A diagram that shows how scientists think different groups of organisms are related
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