Question 1

The Cenozoic is a(n)

Accepted Answer

A)   epoch.
B)   era.
C)   eon.
D)   period.E) C) and D)
F) A) and B)

Question 2

Eons are subdivided first into ______________.

Accepted Answer

The answer of Eons are subdivided first into ______________....

Question 3

A fossil imprint made by the movement of an animal is called a(n) ______________ fossil.

Accepted Answer

The answer of A fossil imprint made by the movement...

Question 4

Geologists think that Earth is how old?

Accepted Answer

A)   4560 billion years
B)   45.6 thousand years
C)   45.6 million years
D)   4.56 billion yearsE) None of the above
F) A) and C)

Question 5

The study of fossils is called

Accepted Answer

A)   paleontology.
B)   biology.
C)   geology.
D)   history.E) A) and B)
F) All of the above

Question 6

The Paleozoic era ended with an event called the

Accepted Answer

A)   Chicxulub Impact.
B)   Cambrian Explosion.
C)   Great Dying.
D)   Pangaean Rift.E) C) and D)
F) A) and B)

Question 7

We live in the period called the

Accepted Answer

A)   Cenozoic.
B)   Holocene.
C)   Ordovician.
D)   Quaternary.E) A) and B)
F) A) and C)

Question 8

The study of fossils is called ______________.

Accepted Answer

The answer of The study of fossils is called ______________....

Question 9

Eras are divided first into

Accepted Answer

A)   epochs.
B)   millennia.
C)   periods.
D)   eons.E) B) and C)
F) None of the above

Question 10

Reasonable values for the absolute ages of sedimentary rocks are frequently determined by relating them to ______________ rocks whose absolute ages have been determined.

Accepted Answer

The answer of Reasonable values for the absolute ages of...

Question 11

The smallest units of geologic time are the

Accepted Answer

A)   eons.
B)   periods.
C)   eras.
D)   epochs.E) B) and C)
F) A) and B)

Question 12

The oldest known fossils of the genus Homo date from about how long ago?

Accepted Answer

A)   6000 years
B)   2 million years
C)   10,000 years
D)   65,000 yearsE) All of the above
F) A) and D)

Question 13

The periods of the Cenozoic era are divided into time units called ______________.

Accepted Answer

The answer of The periods of the Cenozoic era are...

Question 14

Sedimentary layer A is found above sedimentary layer B, and the two are separated by a horizontal layer of ash, C. Therefore, the order from oldest to youngest is

Accepted Answer

A)   B, C, A.
B)   C, B, A.
C)   A, C, B.
D)   none of these.E) B) and C)
F) A) and B)

Question 15

The oldest evidence of life on Earth dates back to about how many years ago?

Accepted Answer

A)   65 million
B)   3.8 million
C)   3.5 billion
D)   570 millionE) A) and B)
F) A) and C)

Question 16

The Jurassic period is part of the ______________ era.

Accepted Answer

The answer of The Jurassic period is part of the...

Question 17

Which of the following is a period of the Cenozoic era?

Accepted Answer

A)   Eocene
B)   Quaternary
C)   Cretaceous
D)   CambrianE) B) and D)
F) B) and C)

Question 18

Potassium-40, one of the six major radionuclides used for radiometric dating, decays to

Accepted Answer

A)   nitrogen.
B)   strontium.
C)   lead.
D)   argon.E) B) and D)
F) None of the above

Question 19

The Paleozoic is a(n)

Accepted Answer

A)   epoch.
B)   era.
C)   eon.
D)   period.E) A) and D)
F) A) and B)

Question 20

Which occurrence is associated with the demise of the dinosaurs?

Accepted Answer

A)   The Great Dying
B)   The Cambrian explosion
C)   The breakup of Pangaea
D)   The K-T eventE) A) and C)
F) A) and B)

Exam 24: Geologic Time

The Jurassic period is part of the ______________ era.

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Sedimentary layer A is found above sedimentary layer B, and the two are separated by a horizontal layer of ash, C. Therefore, the order from oldest to youngest is

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Which occurrence is associated with the demise of the dinosaurs?

Correct AnswerverifiedShow Answer

Potassium-40, one of the six major radionuclides used for radiometric dating, decays to

Correct AnswerverifiedShow Answer

Geologists think that Earth is how old?

Correct AnswerverifiedShow Answer

We live in the period called the

Correct AnswerverifiedShow Answer

Reasonable values for the absolute ages of sedimentary rocks are frequently determined by relating them to ______________ rocks whose absolute ages have been determined.

Correct AnswerverifiedShow Answer

The oldest known fossils of the genus Homo date from about how long ago?

Correct AnswerverifiedShow Answer

Which of the following is a period of the Cenozoic era?

Correct AnswerverifiedShow Answer

The Paleozoic era ended with an event called the

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Eras are divided first into

Correct AnswerverifiedShow Answer

The smallest units of geologic time are the

Correct AnswerverifiedShow Answer

The Cenozoic is a(n)

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The study of fossils is called ______________.

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A fossil imprint made by the movement of an animal is called a(n) ______________ fossil.

Correct AnswerverifiedShow Answer

The study of fossils is called

Correct AnswerverifiedShow Answer

The Paleozoic is a(n)

Correct AnswerverifiedShow Answer

The periods of the Cenozoic era are divided into time units called ______________.

Correct AnswerverifiedShow Answer

The oldest evidence of life on Earth dates back to about how many years ago?

Correct AnswerverifiedShow Answer

Eons are subdivided first into ______________.

Correct AnswerverifiedShow Answer

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