Question 1

In which of the following time periods did coral,clams,fish,plants and insects become abundant?

Accepted Answer

A)  Cenozoic
B)  Mesozoic
C)  Paleozoic
D)  PrecambrianE) A) and B)
F) A) and C)

Question 2

This figure shows two sections of rocks.What is the surest way to correlate a unit in one section to a unit in the other section?

Accepted Answer

A)  match the similar sequence of rocks
B)  find a distinctive unit in both sections
C)  find two layers that both contain fossils
D)  physically trace a unit through the landscape from one section to anotherE) B) and C)
F) None of the above

Question 3

Which of the following features look like fossils but are not?

Accepted Answer

A)  footprints from dinosaurs and other creatures
B)  burrows excavated by worms and other creatures and filled by other sediment
C)  leaves and other plants formed on land
D)  dark minerals that grow in branching patterns
E)  all of these are fossilsF) B) and D)
G) All of the above

Question 4

From this cross section of the Grand Canyon,what is the youngest rock or structure of the ones listed below?

Accepted Answer

A)  Late Cenozoic basalts
B)  Mesozoic sedimentary rocks
C)  Precambrian sedimentary and igneous rocks
D)  Precambrian metamorphic rocks and granite
E)  Hurricane fault and faults along the Grand Wash CliffsF) A) and B)
G) C) and E)

Question 5

From this cross section of the Grand Canyon,what are the oldest rocks or structures?

Accepted Answer

A)  Late Cenozoic basalts
B)  Mesozoic sedimentary rocks
C)  Precambrian sedimentary and igneous rocks
D)  Precambrian metamorphic rocks and granite
E)  Hurricane fault and faults along the Grand Wash CliffsF) C) and E)
G) B) and E)

Question 6

If the contact between the upper light-colored sedimentary layers and the lower dark-colored metamorphic rocks is a depositional contact,what type of feature is present?

Accepted Answer

A)  a surface representing missing geologic time
B)  an angular unconformity
C)  an ancient erosion surface
D)  all of theseE) None of the above
F) All of the above

Question 7

Why don't these two sequences of fossil-bearing rocks match exactly?

Accepted Answer

A)  they represent different parts of geologic time
B)  one section was tilted but not the other
C)  they have different histories of erosion and deposition
D)  one represents a transgression whereas the other represents a regressionE) A) and D)
F) C) and D)

Question 8

The fossil fern in this photograph probably indicate that the rock was deposited:

Accepted Answer

A)  by the wind
B)  in the deep ocean
C)  in the shallow ocean
D)  on landE) B) and D)
F) All of the above

Question 9

What time period is represented by this scene?

Accepted Answer

A)  Mesozoic
B)  Cenozoic
C)  Precambrian
D)  PaleozoicE) A) and B)
F) A) and C)

Question 10

This figure shows two sections of rocks.Which of the following is NOT a valid way to correlate one of the numbered units from one section to another?

Accepted Answer

A)  Units at the top of two sections will automatically be correlative.
B)  A distinctive rock type (breccia in unit 4) is probably equivalent to the same rock type in the other section.
C)  Match units that contain the same types of index fossils (as in unit 3) .
D)  The shale in unit 2 is part of a distinctive sequence that is overlain by the same type of fossils.E) None of the above
F) B) and C)

Question 11

This figure shows a disconformity between an upper dark layer (being deposited by the sea) and a lower light-colored layer.What happened to form this disconformity?

Accepted Answer

A)  The lower layers were tilted and untilted before deposition of the upper layers.
B)  The boundary between the two units indicates that for a time there was either erosion or no deposition.
C)  The lower limestones were converted into another rock type by seawater.
D)  The upper layer must have been deposited by volcanic eruptions.E) B) and C)
F) A) and B)

Question 12

This figure shows the geologic timescale.Which period listed below would be part of the Paleozoic?

Accepted Answer

A)  Permian
B)  Pennsylvanian
C)  Mississippian
D)  Cambrian
E)  all of theseF) B) and D)
G) A) and C)

Question 13

This photograph shows an upper unit with fragments and a lower unit with tilted layers.Which of the following statements is true?

Accepted Answer

A)  the upper unit is younger because it is on top
B)  the upper unit is younger because it contains pieces of the underlying unit
C)  the lower unit is older because it was tilted and eroded before deposition of the upper unit
D)  all of theseE) B) and D)
F) B) and C)

Question 14

Which of the following is evidence that Earth's history is not short?

Accepted Answer

A)  millions of layers of light- and dark-colored sediment that record yearly cycles
B)  rates of seafloor spreading compared to the width of the Atlantic Ocean
C)  a 4-billion-year age on a rock in Canada
D)  thousands of isotopic ages measured by different methods
E)  all of theseF) A) and E)
G) A) and D)

Question 15

Which of the following forms different layers from season to season and can be used to determine how many years the layers represent?

Accepted Answer

A)  tree rings
B)  layers in ice cores
C)  varves
D)  all of theseE) A) and B)
F) A) and C)

Question 16

In which of the following time periods were mammals the dominant type of life?

Accepted Answer

A)  Cenozoic
B)  Mesozoic
C)  Paleozoic
D)  PrecambrianE) A) and D)
F) None of the above

Question 17

What factors are the most critical in determining whether a fossil is preserved?

Accepted Answer

A)  the age of the fossil and the age of sediments in which it is preserved
B)  the temperature of the granite and how fast it cooled
C)  whether the creature had hard parts and how fast it was buried
D)  the color of the original organism compared to the color of the sediments in which it is found
E)  whether the creature was a predator or was preyF) C) and D)
G) A) and B)

Question 18

Which of the following did NOT live during the Mesozoic era?

Accepted Answer

A)  dinosaurs that had a bird-like hip
B)  dinosaurs with a hip structure similar to lizards
C)  large flying reptiles
D)  large marine reptiles
E)  all of these lived during the MesozoicF) None of the above
G) A) and B)

Question 19

This photograph shows light-colored granite and darker diorite (both igneous rocks) .Which of the following statements is true?

Accepted Answer

A)  the light-colored unit is younger because granite is more continental than diorite
B)  the diorite is older because its weathered surfaces are darker
C)  the granite is younger because it crosscuts the diorite
D)  all of theseE) B) and D)
F) A) and D)

Question 20

What time period is represented by this scene?

Accepted Answer

A)  Mesozoic
B)  Cenozoic
C)  Precambrian
D)  PaleozoicE) A) and C)
F) B) and D)

Exam 9: Geologic Time

Which of the following features look like fossils but are not?

Correct AnswerverifiedShow Answer

This figure shows the geologic timescale.Which period listed below would be part of the Paleozoic?

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From this cross section of the Grand Canyon,what is the youngest rock or structure of the ones listed below?

Correct AnswerverifiedShow Answer

If the contact between the upper light-colored sedimentary layers and the lower dark-colored metamorphic rocks is a depositional contact,what type of feature is present?

Correct AnswerverifiedShow Answer

From this cross section of the Grand Canyon,what are the oldest rocks or structures?

Correct AnswerverifiedShow Answer

Which of the following forms different layers from season to season and can be used to determine how many years the layers represent?

Correct AnswerverifiedShow Answer

Why don't these two sequences of fossil-bearing rocks match exactly?

Correct AnswerverifiedShow Answer

This figure shows a disconformity between an upper dark layer (being deposited by the sea) and a lower light-colored layer.What happened to form this disconformity?

Correct AnswerverifiedShow Answer

In which of the following time periods did coral,clams,fish,plants and insects become abundant?

Correct AnswerverifiedShow Answer

In which of the following time periods were mammals the dominant type of life?

Correct AnswerverifiedShow Answer

This figure shows two sections of rocks.What is the surest way to correlate a unit in one section to a unit in the other section?

Correct AnswerverifiedShow Answer

This figure shows two sections of rocks.Which of the following is NOT a valid way to correlate one of the numbered units from one section to another?

Correct AnswerverifiedShow Answer

What factors are the most critical in determining whether a fossil is preserved?

Correct AnswerverifiedShow Answer

Which of the following did NOT live during the Mesozoic era?

Correct AnswerverifiedShow Answer

This photograph shows an upper unit with fragments and a lower unit with tilted layers.Which of the following statements is true?

Correct AnswerverifiedShow Answer

What time period is represented by this scene?

Correct AnswerverifiedShow Answer

What time period is represented by this scene?

Correct AnswerverifiedShow Answer

The fossil fern in this photograph probably indicate that the rock was deposited:

Correct AnswerverifiedShow Answer

Which of the following is evidence that Earth's history is not short?

Correct AnswerverifiedShow Answer

This photograph shows light-colored granite and darker diorite (both igneous rocks) .Which of the following statements is true?

Correct AnswerverifiedShow Answer

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