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Earth Science Test #2 Flashcards | StudBud
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Earth Science Test #2
Earth Science Test #2
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1
Which of the following situations is most likely to create a fossil
soft body parts and a slow burial
a rapid burial and hard body parts
a slow burial and hard body parts
a fast burial and soft body parts
2
The dating process that places geologic events in sequence by comparing layers is known as
relative dating
speed dating
absolute dating
radiometric dating
3
The time it takes for 50% of a radioactive "parent" isotope to become a stable "daughter" is a:
half-time
double life
half-life
isotope
4
Radioactivity is released by the breakdown of unstable....
elements!
nuclei!
isotopes!
all of these!
5
Which of the options presented is the oldest rock on the diagram?
A
D
B
C
6
"The Present is the Key to the Past" is another way of thinking about the..
Law of Superposition
Law of Uniformitarianism
Law of Gravity
Principle of Original Horizontality
7
The period of time before fossils existed (sea life was soft) is called the
Precambrian Era
Holocene Epoch
Phanerozoic
Cambrian Period
8
What is the ratio of parent:daughter after 3 half-lives?
1:2 (1/2)
1:3 (1/4)
1:7 (1/8)
1:15 (1/16)
9
What is the half-life of the parent isotope in this mineral sample?
you can't tell from the picture
1
50
100
10
What process is illustrated below?
folding
angular unconformity
intrusion
inclusions
11
Which type of rock is most likely to include fossils?
sedimentary
metamorphic
igneous
all of these
12
Why would this organism not have a good chance of being fossilized?
it has to leave to deliver ice cream
fossils are not created of modern creatures
it is a rare organism
its squishy body won't preserve well
13
Relative Dating of rock relies on understanding of all of the following EXCEPT:
Law of Superposition
Principle of Cross cutting
Radioactive isotopes
Law of inclusions
14
The process of using fossils to match up rocks of similar ages is known as
correlation
goelogy
sedimentation
succession
15
What is the geologically accepted age of the earth?
4 thousand years
4.6 million years
12 billion years
4.6 billion years
16
What kind of rocks are pictured below?
sedimentary with metamorphic inclusions
Sedimentary rock with igneous inclusions
igneous with sedimentary inclusions
magma with sedimentary inclusions
17
An unconformity is a(n)
layer of sedimentary rocks
intrusive rock
inclusion trapped in a rock
<p>gap in the rock record </p>
18
Fossils are
remains or traces of prehistoric life
living creatures
the oldest layers of rocks in an area
younger than the rock they are buried in
19
What is the process of large rocks breaking down into tiny bits?
deposition
sandification
sedimentation
eriosion
20
Which of the options presented is the youngest rock on the diagram?
b
e
c
d
21
Abundant fossils began to appear on the geologic records approximately:
100 million years ago
540 million years ago
1.0 billion years ago
3 billion years ago
22
An index fossil is useful in dating rock different locations.An Indx fossil must be
only have lived in a short, specific period of geologic time
found in many places
be very abundant (a large population).
it must be all of these things!
23
Where on the diagram can you see an unconformity?
Above B
E
Below B
D
24
This common index fossil is called a:
ammonite
shark tooth
trilobite
megabyte
25
Which is the correct sequence of geologic events?
A--> B-->C-->D-->E
C-->B-->A-->D-->E
C-->D-->E-->B-->A
C-->B-->A-->E-->D
26
According to the principle of Cross-Cutting, an intrusive rock body is
older than the rock around it
younger than the rock around it
rude for intruding
the same age as the rock around it
27
Which law says that older rocks are buried beneath younger rocks?
Superposition
Inclusions
Origninal Horizontality
Disconformities
