Rocks and Minerals

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What forms limestone?

tiny bits of skeletons and shells
What do you call eroded material taht settles on the bottoms of lakes, rivers, oceans?

SEDIMENT
What is made of weathered rock, dead and decaying plant and animal remains?

SOIL
Name the steps in forming fossils.
- 1. After it dies, skin, muscles and other soft body parts decay.
- 2. Sediment settles on the remains.
- 3. More layers form.
- 4. Remains are replaced with minerals that harden into rock.
- 5. Rock layers weather and erode.
- 6. The fossil appears at the surface.
How many major time periods is the history divided?

FOUR
Have geologists found jellyfish in rocks?

Yes, in the Precambrian era.

Author

7992

Card Set

Rocks and Minerals

Description

Chapater 8

Updated

2010-02-24T20:18:23Z

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