Fossils are evidence of past life. Fossils that have been found and placed into chronological order, are part of “The Fossil Record.” Scientists examine the fossil record for patterns that indicate when ancient organisms lived, and how they are related. Fossils found in rock at the bottom of a sequence of layers are older than the fossils found near the top of the sequence.
To better understand the fossil record…
LET’S BREAK IT DOWN!
Evidence of Past Life
Anything that is evidence of past life is a fossil, such as bones, footprints, and shells. Some fossils are trace fossils, that tell about an organism’s activity while it was alive. Examples of this are footprints, burrows, or even fossilized poop! Body fossils are the remains of animals and plants or parts of animals and plants. Examples of body fossils include bones, teeth, shells, and imprints of bark and leaves. When living things die, they decompose, however, under the right circumstances, the organism becomes trapped, rapidly buried, and compressed in sediment allowing remains or traces to be preserved.