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6th Grade - Ch. 8 Fossils
Vocabulary
6
Science
6th Grade
02/07/2013
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Term

 

fossil

 Definition

 

naturally preserved evidence of life
Term

 

mold

 Definition
impression of an organism that is formed when sediments harden around the organism
Term

 

cast

 Definition

 

a model of an organism formed when sediment fills a mold and hardens
Term

 

fossil fuel

 Definition
an energy-rich resource formed from the buried remains of once-living organisms
Term

 

index fossils

 Definition

 

fossils of organisms that lived during a relatively short time span
Term

 

mass extinction

 Definition

 

period of time in which a large number of species become extinct
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