Basic fossils
What are the 4 types of fossils?
Trace fossils
Body fossils
Cast fossils
Mold fossils
How long ago did the woolly mammoth go extinct?
10,000 years ago
Name an example of the hard parts in a fossil
Bones and shells
What is a cast fossil made of?
Hardened minerals from the surrounding area
Is the oldest rock at the bottom or the top of rock formations?
the bottom
What two liquids make up types of body fossils
tar and sticky tree sap
How wide was the longest pterosaurs wing span from tip to tip
30 feet
What is preserved in a tar pit?
hard parts, soft parts, or both?
hard parts (bones)
What are the first and second steps to create a fossil?
Living things dies
Living thing is buried under layers of sediment
Which era is older?
Precambrian or paleozoic
Precambrian
What are the the two types of fossils that are also types of body fossils
cast and mold fossils
They swallowed their food without chewing
What is preserved in sticky tree sap?
Hard parts, soft parts, or both?
Both hard and soft parts
What is sediment made out of?
Bits of rock, sand, shell, and other materials
which era was 400 million years ago?
Paleozoic era
Name two examples of trace fossils
Footprints or tracks, preserved nests, burrows, and eggshells
Which present day animal has similar behavior to the extinct hadrosaur
a peacock
Explain how a mold fossil of a footprint may form
An animal steps in mud, leaving a footprint, then that footprint hardens into rock
Because the hard parts are typically the only parts that are preserved in fossils, what happens to the soft parts?
They decay away or are eaten before they can turn into fossils
What is the biggest thing that we can learn from the geologic time scale?
We can learn the history of the Earth
What is the scientist who studies fossils called?
Paleontologist
Which two states may have previously been under water?
Another name for hardened sap
Amber
What type of rock are fossils found in?
Sedimentary
what are the 3 main types of fossil fuels?
Coal, oil, and natural gas