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types of fossils, how fossils are formed, what can be learned from fossils, fossils from long ago, how fossils became extinct
Terms in this set (16)
the remains of a once living thing that died long ago
Types of Fossils
Animal - bones/teeth
Plant - mostly imprints
Trace - plant imprints, animal footprints
Takes the same shape of the plant or animal. The space is sometimes filled with mud. The mud hardens and turns into rock. Cast are often made from a mold. The inside of the sedimentary rock isn't hollow.
Looks like the shape of the living thing carved into a rock. The inside of the sedimentary rock is a hollow space that takes the shape of the once living thing
Mostly bones and teeth remains of a dead animals
The imprint of the plant hardens and becomes a fossil. Mostly are found in the form of the trace fossil called imprints.
Small animals, mostly insects, get stuck in tree resin. Resin is a sticky substance the comes from a tree. The resin hardens and becomes a fossil
Plant Imprints or animal footprints harden and become fossils
The soft parts of a once living thing is replaced by minerals
How animal fossils form
-Soft parts rot or decompose
-Bone and teeth remains are buried under sediment
-The remains are replaced with minerals and turn into rock
-The earth slowly moves and cracks.
-Wind/Weather (rain, snow, ice) expose the fossil
Scientists that study once living things that no longer exists
What do Paleontologists learn from studying fossils?
-What animals ate
-What the area was like long ago
What does it mean if Paleontologist find fossils in the same place?
-They lived together if found in the same rock
-They are the same age if found in the same layer
What does the layers of rock (sediment) in the earth tell Paleontologists?
It tells how old the fossil is
-Older fossils are in deeper layers of earth
-Younger fossils are in a higher layers of earth
How can Paleontologist figure out what Georgia was like long ago?
Sand dollars, clam fossils, shark teeth and bones were found on land. Those animals are normally under water. Therefore those fossils are evidence that Georgia was once under water
How can a Paleontologist know what food an animal ate long ago?
-Teeth: sharp/ate meat flat/ate plants
-The remains found inside the animal fossil