Question 1

Cenozoic Phanerozoic Mesozoic Paleozoic

Accepted Answer

The answer of Cenozoic Phanerozoic Mesozoic Paleozoic...

Question 2

The major source of free oxygen in the atmosphere is from ________.

Accepted Answer

A)  molten rock
B)  water
C)  green plants
D)  silicate minerals
E)  glaciers

Question 3

Primitive organisms,called ________,reproduce asexually and contain cells that lack organized nuclei.

Accepted Answer

The answer of Primitive organisms,called ________,reproduce asexually and contain cells...

Question 4

The bodies of our solar system began forming about 5 billion years ago from an enormous cloud of minute rocky fragments and gases.

Accepted Answer

A) True 
 B)False

Question 5

During the late Paleozoic,the present-day North America,Europe,western Asia,Siberia,and perhaps China formed the northern continent of ________.

Accepted Answer

A)  Gondwanaland
B)  Laurasia
C)  Greenland
D)  Africa
E)  none of the above

Question 6

Fossil fuels are abundant in Precambrian rocks.

Accepted Answer

A) True 
 B)False

Question 7

One significant difference between oceanic and continental crust in terms of the long term evolution of the earth's surface is that ________.

Accepted Answer

A)  oceanic crust is less dense than continental crust
B)  oceanic crust preserves a history of ancient deformation better than continental crust
C)  continental crust is harder to subduct than oceanic crust
D)  continental crust is more uniform in composition than oceanic crust
E)  oceanic crust contains more radioactive elements that contribute to the heating of the earth.

Question 8

A distinctive characteristic of prokaryotes is ________.

Accepted Answer

A)  their thick cell walls that separate the DNA from the rest of the cell
B)  their lack of a separation between the DNA and the rest of the cell
C)  their oxygen based metabolism
D)  their methane based metabolism
E)  their ability to produce sugars

Question 9

Eukaryotes are the earliest life forms identified on earth and they date back to nearly 3.5 billion years ago.

Accepted Answer

A) True 
 B)False

Question 10

During the early Paleozoic era,the continent of Gondwanaland included North and South America.

Accepted Answer

A) True 
 B)False

Question 11

What would have happened to the earth if the Sun were significantly larger than it is?

Accepted Answer

A)  Our atmosphere would consist mainly of carbon dioxide.
B)  Our atmosphere would consist mainly of nitrogen.
C)  Liquid water and the water cycle would not exist.
D)  Our Sun would have burned out after a few hundred million years so life would not evolve.

Question 12

Planetesimals,asteroid-size objects,form during the early history of the solar nebula due to ________.

Accepted Answer

A)  collisions of particles of ice,metal,and rocky material rotating about the protosun
B)  vortices in the rotating disc associated with the protosun
C)  the formation of comets in the outer parts of the solar nebula
D)  the break-up of the solar nebula as it cools and contracts

Question 13

Cambrian Mississippian Jurassic Devonian

Accepted Answer

The answer of Cambrian Mississippian Jurassic Devonian...

Question 14

The waste gas released by plants as they synthesize food sugars from carbon dioxide and water is ________.

Accepted Answer

A)  oxygen
B)  methane
C)  nitrogen
D)  carbon dioxide

Question 15

One group of reptiles,exemplified by the fossil Archaeopteryx,led to the evolution of ________.

Accepted Answer

A)  dinosaurs
B)  mammals
C)  cephalopods
D)  birds
E)  horses

Question 16

Well preserved remains of many tiny organisms extend the record of life back beyond 5 billion years.

Accepted Answer

A) True 
 B)False

Question 17

The Appalachian Mountains formed as a result of ________.

Accepted Answer

A)  the break-up of Pangaea
B)  the collision of North America and Africa
C)  the collision of North America and Europe
D)  the collision of Greenland and Norway
E)  the initial formation of Pangaea

Question 18

The North American Cordillera formed as a result of ________.

Accepted Answer

A)  the subduction of the Atlantic basin beneath North America
B)  the subduction of the Pacific basin beneath North America
C)  the evolution of the San Andreas Fault zone
D)  the growth of the Appalachian Mountains

Question 19

At the start of the Mesozoic,the climate was ________.

Accepted Answer

A)  humid
B)  dry
C)  very cold
D)  very warm
E)  rapidly changing

Question 20

What would have happened to the earth if it were 10% closer to the sun?

Accepted Answer

A)  Our atmosphere would consist mainly of carbon dioxide.
B)  Our atmosphere would consist mainly of nitrogen.
C)  Liquid water and the water cycle would not exist.
D)  Our sun would have burned out after a few hundred million years so life would not evolve.

Exam 12: Earths Evolution Through Geologic Time

Planetesimals,asteroid-size objects,form during the early history of the solar nebula due to ________.

Correct AnswerverifiedShow Answer

A distinctive characteristic of prokaryotes is ________.

Correct AnswerverifiedShow Answer

Eukaryotes are the earliest life forms identified on earth and they date back to nearly 3.5 billion years ago.

Correct AnswerverifiedShow Answer

The North American Cordillera formed as a result of ________.

Correct AnswerverifiedShow Answer

The bodies of our solar system began forming about 5 billion years ago from an enormous cloud of minute rocky fragments and gases.

Correct AnswerverifiedShow Answer

One significant difference between oceanic and continental crust in terms of the long term evolution of the earth's surface is that ________.

Correct AnswerverifiedShow Answer

Primitive organisms,called ________,reproduce asexually and contain cells that lack organized nuclei.

Correct AnswerverifiedShow Answer

Well preserved remains of many tiny organisms extend the record of life back beyond 5 billion years.

Correct AnswerverifiedShow Answer

What would have happened to the earth if the Sun were significantly larger than it is?

Correct AnswerverifiedShow Answer

Cambrian Mississippian Jurassic Devonian

Correct AnswerverifiedShow Answer

At the start of the Mesozoic,the climate was ________.

Correct AnswerverifiedShow Answer

Cenozoic Phanerozoic Mesozoic Paleozoic

Correct AnswerverifiedShow Answer

The waste gas released by plants as they synthesize food sugars from carbon dioxide and water is ________.

Correct AnswerverifiedShow Answer

What would have happened to the earth if it were 10% closer to the sun?

Correct AnswerverifiedShow Answer

Fossil fuels are abundant in Precambrian rocks.

Correct AnswerverifiedShow Answer

During the early Paleozoic era,the continent of Gondwanaland included North and South America.

Correct AnswerverifiedShow Answer

The Appalachian Mountains formed as a result of ________.

Correct AnswerverifiedShow Answer

During the late Paleozoic,the present-day North America,Europe,western Asia,Siberia,and perhaps China formed the northern continent of ________.

Correct AnswerverifiedShow Answer

One group of reptiles,exemplified by the fossil Archaeopteryx,led to the evolution of ________.

Correct AnswerverifiedShow Answer

The major source of free oxygen in the atmosphere is from ________.

Correct AnswerverifiedShow Answer

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