Question 1

The disk-shaped cloud that formed our solar system is called the solar nebula because:

Accepted Answer

A)  the concentrated mass near the center eventually forms into the Sun. 
B)  it is whirled around by solar wind. 
C)  the spinning disk was infinitely brighter than the rest of the solar system. 
D)  None of the above is correct. 
A)  the concentrated mass near the center eventually forms into the Sun. 
B)  it is whirled around by solar wind. 
C)  the spinning disk was infinitely brighter than the rest of the solar system. 
D)  None of the above is correct.

Question 2

Which of the following did not happen to Earth's original rocks?

Accepted Answer

A)  They formed the base rock for some of Earth's highest mountains. 
B)  They were recycled in the rock cycle. 
C)  They were consumed by erosion. 
D)  They were consumed by plate tectonics. 
A)  They formed the base rock for some of Earth's highest mountains. 
B)  They were recycled in the rock cycle. 
C)  They were consumed by erosion. 
D)  They were consumed by plate tectonics.

Question 3

The most distinctive chemical and physical boundary within Earth is between the mantle and core.

Accepted Answer

A) True 
 B)False

Question 4

Although spectacular collisions like comet Shoemaker-Levy 9 impact with Jupiter in 1994 provide evidence that planetary accretion is still occurring, near all the mass of the solar nebula now resides in the sun and planets. When did Earth, for the most part, attain its current mass and volume?

Accepted Answer

A)  65 million years ago 
B)  12,000 years ago 
C)  it hasn't 
D)  4,500 million years ago 
A)  65 million years ago 
B)  12,000 years ago 
C)  it hasn't 
D)  4,500 million years ago

Question 5

Why did the first planetesimals form at the outer edge of the nebular disk?

Accepted Answer

A)  The smaller particles were gathered at the outer edge. 
B)  The heat of fusion was more favorable there. 
C)  Cooler temperatures favored condensation there. 
D)  The planetary accretion gravity spun the planetesimal particles to the outer edge. 
A)  The smaller particles were gathered at the outer edge. 
B)  The heat of fusion was more favorable there. 
C)  Cooler temperatures favored condensation there. 
D)  The planetary accretion gravity spun the planetesimal particles to the outer edge.

Question 6

Which statement about the solar nebula is false?

Accepted Answer

A)  It is formed as gas and dust spin faster and faster. 
B)  It will eventually become a Sun. 
C)  It will form stars and planets. 
D)  It requires the Sun's energy to spin. 
A)  It is formed as gas and dust spin faster and faster. 
B)  It will eventually become a Sun. 
C)  It will form stars and planets. 
D)  It requires the Sun's energy to spin.

Question 7

After about 100,000 years, what is the internal temperature of a nebular disk?

Accepted Answer

A)  3 000 degrees 
B)  4 000 degrees 
C)  100 000 degrees 
D)  1 million degrees 
A)  3 000 degrees 
B)  4 000 degrees 
C)  100 000 degrees 
D)  1 million degrees

Question 8

Figure 9.15  
-Using Figure 9.15 in your textbook, what is the ratio of cubic kilometers of water in ice to water in rock-forming minerals?

Accepted Answer

A)  27.5 million: 420 million 
B)  420 million: 27.5 million 
C)  420 million: 8.35 million 
D)  1.35 billion: 420 million 
A)  27.5 million: 420 million 
B)  420 million: 27.5 million 
C)  420 million: 8.35 million 
D)  1.35 billion: 420 million

Question 9

Present day heat flow from within Earth is twice as high as could be expected from radioactivity's contribution. This suggests that

Accepted Answer

A)  more radioactivity is occurring than what scientists have accounted. 
B)  volcanic action contributes more than scientists presently understand. 
C)  Earth used to be much hotter. 
D)  movement within the core causes heating by friction. 
A)  more radioactivity is occurring than what scientists have accounted. 
B)  volcanic action contributes more than scientists presently understand. 
C)  Earth used to be much hotter. 
D)  movement within the core causes heating by friction.

Question 10

Which statement about solar wind is false?

Accepted Answer

A)  Solar wind is created by fast-moving protons and electrons. 
B)  Solar wind is caused by heat in the Sun. 
C)  Solar wind includes periodic blasts of air. 
D)  Our Sun's solar winds are less intense now than in its early history. 
A)  Solar wind is created by fast-moving protons and electrons. 
B)  Solar wind is caused by heat in the Sun. 
C)  Solar wind includes periodic blasts of air. 
D)  Our Sun's solar winds are less intense now than in its early history.

Question 11

Earth was once much, much hotter than it is today?

Accepted Answer

A) True 
 B)False

Question 12

What determines the chemical composition of the dust particles that form around a protostar?

Accepted Answer

A)  heat 
B)  pressure 
C)  contents of the star that exploded to form the protostar 
D)  gravity of nearby objects 
A)  heat 
B)  pressure 
C)  contents of the star that exploded to form the protostar 
D)  gravity of nearby objects

Question 13

The oceanic crust has an average age of ________ and a maximum age of ________.

Accepted Answer

A)  200 million; 400 million 
B)  80 million; 200 million 
C)  100 million; 180 million 
D)  90 million; 300 million 
A)  200 million; 400 million 
B)  80 million; 200 million 
C)  100 million; 180 million 
D)  90 million; 300 million

Question 14

What is defined here? "mixtures of ice and rock like dirty snowballs"

Accepted Answer

A)  comets 
B)  meteors 
C)  asteroids 
D)  meteorites 
A)  comets 
B)  meteors 
C)  asteroids 
D)  meteorites

The disk-shaped cloud that formed our solar system is called the solar nebula because:

Which of the following did not happen to Earth's original rocks?

The most distinctive chemical and physical boundary within Earth is between the mantle and core.

Although spectacular collisions like comet Shoemaker-Levy 9 impact with Jupiter in 1994 provide evidence that planetary accretion is still occurring, near all the mass of the solar nebula now resides in the sun and planets. When did Earth, for the most part, attain its current mass and volume?

Why did the first planetesimals form at the outer edge of the nebular disk?

Which statement about the solar nebula is false?

After about 100,000 years, what is the internal temperature of a nebular disk?

Figure 9.15 -Using Figure 9.15 in your textbook, what is the ratio of cubic kilometers of water in ice to water in rock-forming minerals?

Present day heat flow from within Earth is twice as high as could be expected from radioactivity's contribution. This suggests that

Which statement about solar wind is false?

Earth was once much, much hotter than it is today?

What determines the chemical composition of the dust particles that form around a protostar?

The oceanic crust has an average age of and a maximum age of .

What is defined here? "mixtures of ice and rock like dirty snowballs"

Why Study Earth

Minerals: Building Blocks of the Planet

Rocks and Rock-Forming Processes

Formation of Magma and Igneous Rocks

Formation of Sediment and Sedimentary Rocks

Formation of Metamorphic Rocks

Earth Materials As Time Keepers

Earth Materials As Time Keepers

Motion Inside Earth

Deformation of Rocks

Global Tectonics: Plates and Plumes

Tectonics and Surface Relief

Soil Formation and Landscape Stability

Mass Movements: Landscapes in Motion

Streams: Flowing Water Shapes the Landscape

Water Flowing Underground

Glaciers: Cold-Climate Sculptors of Continents

Shorelines: Changing Landscapes Where Land Meets Sea

Wind: a Global Geologic Process

Global Warming: Real Time Change in the Earth System

Filters

Exam 9: Making Earth

The disk-shaped cloud that formed our solar system is called the solar nebula because:

Which of the following did not happen to Earth's original rocks?

The most distinctive chemical and physical boundary within Earth is between the mantle and core.

Although spectacular collisions like comet Shoemaker-Levy 9 impact with Jupiter in 1994 provide evidence that planetary accretion is still occurring, near all the mass of the solar nebula now resides in the sun and planets. When did Earth, for the most part, attain its current mass and volume?

Why did the first planetesimals form at the outer edge of the nebular disk?

Which statement about the solar nebula is false?

After about 100,000 years, what is the internal temperature of a nebular disk?

Figure 9.15 -Using Figure 9.15 in your textbook, what is the ratio of cubic kilometers of water in ice to water in rock-forming minerals?

Present day heat flow from within Earth is twice as high as could be expected from radioactivity's contribution. This suggests that

Which statement about solar wind is false?

Earth was once much, much hotter than it is today?

What determines the chemical composition of the dust particles that form around a protostar?

The oceanic crust has an average age of ________ and a maximum age of ________.

What is defined here? "mixtures of ice and rock like dirty snowballs"

Why Study Earth

Minerals: Building Blocks of the Planet

Rocks and Rock-Forming Processes

Formation of Magma and Igneous Rocks

Formation of Sediment and Sedimentary Rocks

Formation of Metamorphic Rocks

Earth Materials As Time Keepers

Earth Materials As Time Keepers

Motion Inside Earth

Deformation of Rocks

Global Tectonics: Plates and Plumes

Tectonics and Surface Relief

Soil Formation and Landscape Stability

Mass Movements: Landscapes in Motion

Streams: Flowing Water Shapes the Landscape

Water Flowing Underground

Glaciers: Cold-Climate Sculptors of Continents

Shorelines: Changing Landscapes Where Land Meets Sea

Wind: a Global Geologic Process

Global Warming: Real Time Change in the Earth System

Filters

The oceanic crust has an average age of and a maximum age of .