Geologic Time

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1.
2 points
Fossils are usually found in what type of rock?
2.
2 points
A type of organism that no longer exists and will never again live in Earth is said to be..
3.
2 points
All of the following are types of fossils EXCEPT..
4.
2 points
The earliest forms of life appeared during the
5.
2 points
What type of geologic dating is used to determine if one thing is older or younger than another?
6.
2 points
Scientists who study fossils are called..
7.
2 points
During _________________ atoms of an unstable element break down to form atoms of another element.
8.
2 points
Subdivisions of time in the periods of the Cenozoic era are called
9.
2 points
Fossils provide evidence for all of the following EXCEPT for..
10.
2 points
Scientists who study the Earth are called..
11.
2 points
The preserved remains or traces of living things are called..
12.
2 points
Earth's most recent era is the
13.
2 points
On the Geologic time scale, eras are divided into
14.
2 points
How old is the Earth?
15.
2 points
Which are the periods of the Mesozoic era in order from the beginning?
16.
2 points
A gap in the geologic record is called a(n)..
17.
2 points
The gradual change in living things over long period of time is called
18.
2 points
All of the following show examples of ABSOLUTE ages EXCEPT
19.
2 points
Why can't radioactive dating be used to date sedimentary rocks?
20.
2 points
The Geologic Time Scale is