WEIT Chap2
What is a fossil?
A fossil looks like a stone, but it is not really a stone. It is a memory of an animal that lived a long time ago. The addition of a time factor and chemical reactions formed it. We will explain precisely how a fossil is formed later.
How are fossils formed?
The formation of a fossil begins as the rest of an animal (or plant) falls in water. As this happens, the rest of the animal is covered by sediments. This secretes a kind of stone which wears the track of the organism. That is why we can discover animals that were born thousands or millions of years ago!
Are fossils easily found?
Fossils can be found everywhere.
Why are fossils important for Evolution study?
Fossils are the evidence of evolution. Without them, we would have only a "theoric" sketch of how species evolved throughout the centuries.
What is the "fossil record" ?
How is formed a fossil?
The very first fossils found..
What information can we find in fossils ?
Which problems can we have with fossils ?
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