Unit 4 - Earth's History
Terms in this set (15)
Law of Superposition
The OLDER the rock is, the FARTHER DOWN it will be buried (as long as the rock layers have not been disturbed).
a fossil known to have lived in a specific time that can be used to date that rock layer
collection of fossils giving information about past life, including the structure of organisms, what they ate, what ate them, in what environment they lived, and the order in which they lived
small, solid pieces of material that come from rocks or living things
weathering and erosion
Processes that break down a rock to form sediments.
fossils that show links in traits between groups of organisms used to show stages in the evolution of a species.
traits with a similar structure but different function can be used as evidence for a common ancestor
Similar function but different structure - does not show common ancestry - Ex: butterfly wing and bat wing)
A structure that is present in an organism but no longer serves its original purpose
parts of an ancient organism preserved in rock
An animal with a backbone
the most recent ancestor species from which two different species evolved
"missing link" thought to be a transitional form between fish and tetrapods
Theory of Continental Drift
Idea that at one point in time all of the continents were all together and they moved gradually over time.
The name of the single "supercontinent" that existed 300 million years ago and gave rise to today's continents
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