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Geological Time
Test Description: Chapters 12 and 13
Instructions: Answer all questions to get your test result.
1) Sedimentary rocks record past geological events and
A
changing life forms of the past
B
astronomical milestones of the past
C
written history
D
Earth\'s circumference and diameter in the past
2) In what type of rocks would geologosts most likely find evidence of past life forms
A
sedimentary rock
B
metamorphic rock
C
igneous rock
D
volcanic rock
3) The geological processes that shape the Earth\'s features today
A
did not operatre in the distant past
B
are much different than thousands of years ago
C
became important only several hundred years ago
D
are basically the same as they were in the geological past
4) According to the principle of cross cutting relationships, and instrusive rock body is
A
deposited as sedimentary layers
B
always made of the same materials as rock around it
C
older than the rocks into which it intrudes
D
younger than the rocks into which it intrudes
5) The dating process that places geological events in proper sequence is referred to as
A
temporary dating
B
numerical dating
C
relative dating
D
radiometric dating
6) What type of unconformity consists of tilted sedimentary rocks that are over layed by younger, more flat lying sedimentary rocks?
A
disconformity
B
conformity
C
nonconformity
D
angular unconformity
7) Fossils are the
A
living creatures with habitats in or around rock
B
remains or traces of prehistoric life
C
oldest rock layers in a region
D
objects that people left behind as artifacts
8) Assume you began with 10 g or a radioactive parent isotope. Home many grames of parent isotope will be present in the sample after 2 half lives?
A
2.5 g
B
5 g
C
1.25 g
D
0.63 g
9) Which two substances do geologist use in radio carbon dating?
A
carbon 14 and uranium 238
B
carbon 12 and carbon 14
C
lead 206 and carbon 14
D
carbon 12 and carbon 10
10) What is the currently accepted age of the Earth?
A
approximately 10 billion years
B
approximately 4.6 million years
C
approximately 4.6 billion years
D
approximately 5.6 billion years
*select an answer for all questions
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