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What forms limestone?
tiny bits of skeletons and shells
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What do you call eroded material taht settles on the bottoms of lakes, rivers, oceans?
SEDIMENT
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What is made of weathered rock, dead and decaying plant and animal remains?
SOIL
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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.
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How many major time periods is the history divided?
FOUR
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Have geologists found jellyfish in rocks?
Yes, in the Precambrian era.
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