Fossil types
How do tar pits fossilize organisms that fell into them?
They dissolve soft tissues and preserve hard body parts like the exoskeleton and bones.
What percentage of all living species have ever been fossilized?
The remains of less than 1%
Fossils are primarily found in what type of rock?
Sedimentary Rock
A geometric column is a layer of rocks where the _________ are found at the top and the __________ are found at the bottom.
youngest, oldest
What happens to the number of species after each mass extinction event?
They increase.
Burrows, scratches and fossilized dung are all types of what kind of fossils?
Trace fossils
In your fossil formation lab, the glue represents what?
The glue represents the minerals that harden from the water.
Radioactive decay turns Uranium into what stable particle?
Lead
The body plans of animals become more simple as they evolve over time.
False.
We know that fish eventually evolved into amphibians because of?
Transition fossils.
In your fossil lab what kind of fossils did we create?
Cast and Mold fossils
Geologic events that happened in the past, are happening today and they happen everywhere on earth is known as what?
Uniformitarianism
We can find the absolute age of Igneous rock layers.
True or False
True
These type of fossils are good for estimating the age of other fossils found in the same layers because they are common, unique and found everywhere on Earth.
Index Fossils
During extinction events some mammals went extinct? What are the 3 requirements for an animal to be considered a mammal?
1. Have fur
2. Give live birth
3. Feed their young milk.
In permineralized fossils, the bone is replaced with what?
Minerals from the water
Why can we find a lot of well preserved fossils in the Morrison formation?
Because there was a lot of flooding and rivers in that area.
What is the half life of Uranium? Be specific.
704 Million Years
The first fossils ever left behind can be found in which layer of a geologic column?
the lowest layer.
The Permian Triassic event was caused by the release of this toxic gas into the oceans.
Methane
Nitrogen, Hydrogen and Oxygen being removed, leaving behind only a thin black film describes what type of fossils?
Carbonized fossils
The earliest evidence of life can be found how many years ago?
If Uranium has a half life of 75 Million years, after three half lives, how many years have gone by?
225
Where would we find fossils of angiosperms in the geologic column? Before moss or after?
After
The dinosaurs were completely wiped out by a comet how many years ago?
65 MYA