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fossil notes

stuff about fossils for science testtt

QuestionAnswer
The change of living things over a long period of time evolution
only what part of an organism can become a fossil hard part(s)
how many and what are the five different kinds of fossils 5: casts and molds, carbon film, trace fossil, preserved remains and petrified
casts and molds a cast is a solid copy of the organism. A mold is a hollow area in the sediment that is in the shape of an organism.
Trace Fossil Provides evidence of activities of an organism. Examples are ft prints of worm holes.
Preserved Remains- Are the original remains of ancient life. They can be preserved in amber (tree sap), tar or ice.
petrified When minerals replace the hard parts of an organism. Petrified means “turned to stone”.
index fossil Is an organism that is widely distributed around the world, but only lived a short period of time.
relative age Is the age of a rock as compared to other rocks.
absolute age Is the exact age of the rock since it was formed, its birth.
Law of Superposition States that the oldest rock layers will be on the bottom with younger rock layers above.
Radioactive dating allows scientists to find the absolute age of a rock by finding out the amount of radiation in the rock.
Created by: rainb0wz3bra
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