General Science Module 7
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The preserved remains of a once-living organism
The conversion of organic material into rock
A thick, slowly flowing liquid produced by plants that can harden into a solid
A term applied to a species that was once living but now is not
The process that forms a detailed "drawing" of a creature in stone
The sum total of all discovered fossils
Which comes first, a cast or a mold?
What usually happens when an organism dies?
What is needed for petrifaction?
Water with minerals in it
Most fossils are fossils of what?
Hard-shelled organisms, like clams
About how many creatures have gone extinct since the last 400 years?
What important assumption does uniformitarianism make?
The present is the key to the past
What imprtant assumption does catastrophistism make?
The processes that formed most of the earth will not be repeated
What would you like to do?
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