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Earth Science- Ch. 10 Review Flashcards | StudBud
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Earth Science- Ch. 10 Review
Earth Science- Ch. 10 Review
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Relative-age & Absolute-age Dating
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
Which principle states that sedimentary rocks are deposited in large sheets of sediment?
Correlation
Lateral continuity
Original horizontality
2
According to the cross-section above, which rock is older- A or B?
B
A
3
Which rock in the sequence is younger than the fault G?
E
H
A
B
4
Which rock in the diagram is the oldest?
F
B
A
H
5
Radiometric methods provide accurate ages for
Ingenous rocks
Sedimentary rocks
Carbon-rich rocks
6
A river erodes through layers of rock, lt's the same on each side, what principle is this?
Cross-cutting relationships
Original horizontality
Lateral continuity
Superposition
7
An absolute age rock is an age
Relative to another rock
Based on fossils
In years
8
What is half life?
The numerical age of half of the daughter material
Time required for half of a radioactive substance to decay
the numerical age, in years, of a rock or other object
9
In the lab, Candium decayed into Greenium. Candium is the ____ isotope?
Stable
Parent
Daughter
10
What is a nonconformity?
An erosional gap in the rock record
A method of matching similar rock layers
A contact between sedimentary and other rock types
11
Feature G is a fault, Did the fault occur before or after rock layer F was deposited?
Before
After
12
Which principle could be used to date a stack of horizontal rock layers?
Cross-cutting relationships
Lateral continuity
Superposition
13
Which rock is older- rock B or rock C?
B
C
14
What statement is true of inclusion ?
They are younger than the rocks that contain them
They are older than the rocks that contain them
They are the same age as the rocks that contain them
15
An absolute age of a mammoth bone could be determined using ______?
Carbon-14
Uranium-238
Rubidium-87
16
What is true of any fault ?
It is older than the rock it cuts
it is younger than the rock it cuts
It is the same age as the rock it cuts
17
What type of unconformity's at point D? Rock A is igneous. The black layer above is sedimentary
None of above
Angular Unconformity
Disconformity
Nonconformity
18
What is the relative age of a rock?
An exact age, in years
An approximate age when compared to other rocks
An exact age as shown by index fossils
19
Which geologic principle can be used to determine the age of rock C?
Principle of Inclusions
Principle of Lateral Continuity
Principle of Original Continuity
Principle of Baked Contacts
20
Earth's approximate age was determined using isotopes that have
Steep radioactive decay curves
Low ratios of C-14 to C-12
Very long half-lives
21
Which object could be accurately dated using carbon -14 ?
A sedimentary rock
Earth itself
A mammoth preserved in ice
22
During radioactivity decay,
The half life of parent material gets longer
The amount of parent material increases
The amount of daughter material increases
23
Radiometric dating methods indicate the Earth is about ______years old.
4.54 thousand
4.54 million
4.54 billion
24
What is the priciple of superposition
older things are on the bottom and younger closer to the top
older and some younger on the bottom and most younger on top
younger things on the bottom and older things on top
younger and some older on the bottom, most older on top
25
Isotopes are atoms of the same element with different numbers ________?
Protons
Neutrons
Electrons
