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Geologic Time Scale Review
Test Description: A review of vocabulary and concepts covered in the cct unit and chapter 4 of the earth science text
Instructions: Answer all questions to get your test result.
1) What does the geologic time scale represent?
A
The fossil record as we know it.
B
The theorized development of life on earth dating back 4.6 billion years ago
C
The geologic history of universe
D
The age of the earth and all creatures on it.
2) What do scientists think the first life form was?
A
Dinosaurs
B
Blue-green bacteria
C
Mammals
D
Insects
3) What is a fossil?
A
An imprint or hollow in a rock, shaped like an organism
B
The remains or traces of an organism that lived long ago.
C
A mold filled with hardened sediments
D
Hardened tree sap
4) What parts of organisms are most likely to become fossilized?
A
Bones
B
All of the above
C
Shells
D
Teeth
5) Why do scientists study fossils?
A
Fossils are clues to Earth\'s evolutionary history
B
To determine which organisms may be ancestors of present day orgainsms
C
Both a and b
D
Neither a nor b
6) Fossils can show how the earth\'s __________has changed over time.
A
Climate
B
Mountain ranges
C
Ozone layer
D
Core
7) How can the relative age of fossils and rock layers be determined?
A
What area of the world the rock layer is found in.
B
The Law of Superpositon
C
What type of rock is present.
D
How many fossils are found in the rock layer.
8) The Law of Superposition states:
A
The length of time it takes for one-half of the radioactive element to change into a stable element.
B
Fossils are only as old as the rock they are found in.
C
Each undisturbed sedimentary rock layer is older than the layer above it.
D
Energy is neither created or destroyed, it simple changes form.
9) What would you use to radio date a 1,000,000 year old fossil?
A
U-238
B
Uranium
C
Carbon 14
D
Lead
10) A natural fuel that was formed from the remains of once living organisms:
A
Diamonds
B
Fossil fuel
C
Uranium
D
Wood
*select an answer for all questions
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