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Geologic Time
Test Description: Basics of Geologic Time Scale/Intro Game
Instructions: Answer all questions to get your test result.
1) Earth is approximately ___________________ years old.
A
4.6 million
B
46 billion
C
4.6 billion
D
46 million
2) The geologic time scale is broken into __________ that are broken into ______________ that are broken into _______________.
A
eras; periods; eons
B
periods; eons; eras
C
slices of bread, pieces of toast, PBJ
D
eons; eras; periods
3) What's relative dating?
A
This relates to the idea that the oldest fossils are found on top of rock layers and the youngest are at the bottom.
B
This is when you use radioactive materials found in rocks to figure out the age of the rock.
C
This is when you use the comparative ages of rocks without using the absolute age.
D
This is what happens in Arkansas when you date your cousins.
4) The process by which the age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample
A
Dating Your Cousin
B
Radioactive decay
C
Relative dating
D
Law of Superposition
5) Which era are we currently in?
A
Cenozoic
B
Pre-Cambrian
C
Mesozoic
D
Paleozoic
6) Which era was the Age of Dinosaurs/Reptiles?
A
Paleozoic
B
Cenozoic
C
Mesozoic
D
Pre-Cambrian
7) Which era was Age of Invertebrates?
A
Cenozoic
B
Paleozoic
C
Mesozoic
D
Pre-Cambrian
8) Which of the following has the eras in order from oldest to current?
A
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
B
Cenozoic, Mesozoic, Paleozoic, Pre-Cambrian
C
Pre-Cambrian, Mesozoic, Paleozoic, Cenozoic
D
Cenozoic, Pre-Cambrian, Paleozoic, Mesozoic
9) The law of superposition has to with the idea that
A
older rocks are found generally at the bottom and youngest at top
B
Pangaea was when the continents were positioned together in one big super continent
C
superman prefers to be positioned in the sky
D
younger rocks are found at the top and youngest at the bottom
10) Absolute dating is when
A
radioactive decay is used to figure out the age of rocks
B
rocks that are older are found at the bottom and younger are found at the top
C
radioactive decay is used to get a comparison of the age of rocks
D
you absolutely have to date that new boy or girl in class
11) How would a biologist BEST determine the reason for extinction of a species?
A
examine fossils of plants and animals in different rock layers to see how these organisms have changed
B
use relative dating for each layer of rocks in a cross section
C
conduct experiments on carbon dating
D
read previous theories for connections
12) A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery?
A
Erosion turned most of the limestone in the area into sand.
B
Volcanic activity once occurred in the area.
C
A catastrophic event once occurred in the area.
D
The area was once covered by water.
13) The law of superposition is used for _______________ dating and radiometric dating is used for ______________.
A
relative; radioactive
B
relative; absolute
C
absolute; relative
D
radioactive; relative
14) How is radioactive decay used to date rocks?
A
Silly - rocks don't date. They aren't even alive. Minerals are exchanged though at wedding ceremonies!
B
Unstable elements break down at a predictable rate. By comparing the decayed to radioactive elements you can get the age.
C
Isotopes of different compounds are compared
D
Stable elements break down at a predictable rate. By comparing the decayed to radioactive elements you can get the age.
*select an answer for all questions
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