Evidence for the origins of life on Earth

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  • Created by: Nicole D
  • Created on: 24-02-14 13:07
Evidence for the origins of life on Earth
7 Questions
1 of 9
What is the main form of evidence for the origins of life on Earth?
Fossils
2 of 9
What are fossils?
'Remains' of organisms from hundreds of thousands of years ago
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Where are fossils found?
Preserved in rocks, ice and other places
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There are 4 main ways how a fossil can be formed:
.
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1.
Mud sometimes preserves the softer tissues --> stops decomposition
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2.
Tracks in mud are dried. They are then filled with sediment.
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3.
Fossilised in hardened tree sap
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4.
Dead remains fall into sea and become buried ; They harden ; Compressed by rocks ; Rocks brought to surface ; Land movements expose fossils
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Other cards in this set

Card 2

Front

What is the main form of evidence for the origins of life on Earth?

Back

Fossils

Card 3

Front

What are fossils?

Back

Preview of the front of card 3

Card 4

Front

Where are fossils found?

Back

Preview of the front of card 4

Card 5

Front

There are 4 main ways how a fossil can be formed:

Back

Preview of the front of card 5
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