any part or trace of a living organism that is naturally preserved after it dies
responsible for most of the fossils we see today
fossils that are made when bone or wood is replaced by minerals that harden into rock
sometimes an organism is pressed into a rock and leaves an imprint
formed when sediment fills in the empty space in a mold and produces a copy of the shape of an organism
a dark image made from plants pressed in rock
hardened, yellow plant sap
a fossil formed from something that an organism left behind- a footprint, a hole where an animal lived, or its droppings
fossils can be preserved in
sediment, amber, ice, and tar
beliefs about how the earth began
influence our conclusions about fossils
people who believe that life on earth developed gradually, or evolved
people who believe that God spoke and created the earth and all forms of life in six days
the great flood accounts for most fossils; the earth is only thousands of years old; the Genesis 1 account of the earth's origin
layers of rock represent geologic ages (long time periods), age of fossil can be found by looking at the layer in which the fossil was found; life on earth developed gradually over millions of years; earth came into being simply by chance
the scientific study of fossils
the process of removing a fossil from the rock and other material around it
1st step for excavating a fossil
photograph the site
2nd step for excavating a fossil
make a detailed map of the site
3rd step for excavating a fossil
excavate (remove) fossil
4th step for excavating a fossil
number the individual bones
5th step for excavating a fossil
wrap the bones to keep them from breaking
scientists cannot tell from an animals skeleton
the animals muscles and outward appearance
problem with carbon dating
carbon dating is not accurate
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