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Evidence of Evolution

ADRIANA PATRICIA ROD

Created on November 5, 2020

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Transcript

Fossil Evidence and Geologic time scale

Fossils over Time

  • The geologic time scale is a record of the earth's geologic history as scientists have come to understand it by studying the layers in rock.
  • The geologic time scale is broken up into larger and smaller subdivisions, which help us get a better sense of how historical events fit together..

Extinctions

Extinction occurs when the last individual organism of a species dies.

mass extinctions

A mass extinction occurs when many species become extinct within a few million years or less.

Mass Extinctions

The fossil record contains evidence that five mass extinction events have occurred during the Phanerozoic eon.

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gracias