Fossils and evolution

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  • Created by: eemoyeni
  • Created on: 20-01-14 19:34
What are fossils?
Fossils are the preserved traces or remains of organisms that lived thousands or millions of years ago.
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What is the fossil record?
The fossil record in rocks gives us evidence of what the living organisms were like and how they changed over time.
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What is evolution?
Evolution is a change over time.
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Who do fossils not always form?
Fossils only form if conditions in the ground are suitable (e.g not too acidic)
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Why does soft tissue decaying affect the fossil record?
Hard tissue (e.g bones and wood) may fossilise but soft tissue (e.g muscle and leaves) usually decay too quickly to fossillise. Soft tissue forms impression fossils only in very special conditions.
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Why are many fossils are yet to be found?
We only find fossils where we can dig them up - many are much deeper in the ground than this.
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What is the basic pentadactyl structure?
Many living vertebrates have the same basic pentadactyl (five-fingered) structure to their limbs.
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Other cards in this set

Card 2

Front

What is the fossil record?

Back

The fossil record in rocks gives us evidence of what the living organisms were like and how they changed over time.

Card 3

Front

What is evolution?

Back

Preview of the front of card 3

Card 4

Front

Who do fossils not always form?

Back

Preview of the front of card 4

Card 5

Front

Why does soft tissue decaying affect the fossil record?

Back

Preview of the front of card 5
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