Question 1

In noting that our world is "differentiated," we mean that:

Accepted Answer

A)  the density of its materials decreases as you go downward toward the core. 
B)  the Earth has evolved in a different pattern than any other planet. 
C)  the iron and nickel core is denser than the silicate mantle and crust. 
D)  radioactive heating in the core is at a slower pace than when the Earth was new. 
E)  the Earth's magnetic field is different now in polarity than it was 700,000 years ago. 
A)  the density of its materials decreases as you go downward toward the core. 
B)  the Earth has evolved in a different pattern than any other planet. 
C)  the iron and nickel core is denser than the silicate mantle and crust. 
D)  radioactive heating in the core is at a slower pace than when the Earth was new. 
E)  the Earth's magnetic field is different now in polarity than it was 700,000 years ago.

Question 2

Greenhouse gases in our atmosphere trap just enough heat to keep the Earth's oceans liquid.

Accepted Answer

A) True 
 B)False

Question 3

Clouds form primarily at the boundary between:

Accepted Answer

A)  the stratosphere and the mesosphere. 
B)  the mesosphere and the ionosphere. 
C)  the troposphere and the mesosphere. 
D)  the troposphere and the stratosphere. 
E)  the hydrosphere and the troposphere. 
A)  the stratosphere and the mesosphere. 
B)  the mesosphere and the ionosphere. 
C)  the troposphere and the mesosphere. 
D)  the troposphere and the stratosphere. 
E)  the hydrosphere and the troposphere.

Question 4

The relative size of the mantle of Earth compared to the solid inner core of Earth is most similar to:

Accepted Answer

A)  the peel of an orange as compared to the meat of the orange. 
B)  the rind of a watermelon as compared to the meat of the watermelon. 
C)  the skin of a grape as compared to the meat of the grape. 
D)  the meat of a peach as compared to the pit of the peach. 
E)  the meat of a cherry as compared to the pit of the cherry. 
A)  the peel of an orange as compared to the meat of the orange. 
B)  the rind of a watermelon as compared to the meat of the watermelon. 
C)  the skin of a grape as compared to the meat of the grape. 
D)  the meat of a peach as compared to the pit of the peach. 
E)  the meat of a cherry as compared to the pit of the cherry.

Question 5

From the center outward,the correct order is:

Accepted Answer

A)  liquid iron inner core, solid nickel outer core, rocky mantle, silicate crust. 
B)  solid metallic inner core, molten metal outer core, silicate mantle and crust. 
C)  solid metal core, molten metal hydrosphere, rocky lithosphere, gases in atmosphere. 
D)  solid rock core, liquid metal mantle, solid rock crust. 
E)  molten metal hydrosphere, molten rock lithosphere, solid silicate crust. 
A)  liquid iron inner core, solid nickel outer core, rocky mantle, silicate crust. 
B)  solid metallic inner core, molten metal outer core, silicate mantle and crust. 
C)  solid metal core, molten metal hydrosphere, rocky lithosphere, gases in atmosphere. 
D)  solid rock core, liquid metal mantle, solid rock crust. 
E)  molten metal hydrosphere, molten rock lithosphere, solid silicate crust.

Question 6

What event triggered the dramatic increase in atmospheric carbon dioxide concentration seen over the last couple of centuries?

Accepted Answer

A)  the invention of CFCs 
B)  the invention of the automobile 
C)  the Tunguska meteoric impact 
D)  the volcanic eruption in Iceland in 1783 
E)  the Industrial Revolution 
A)  the invention of CFCs 
B)  the invention of the automobile 
C)  the Tunguska meteoric impact 
D)  the volcanic eruption in Iceland in 1783 
E)  the Industrial Revolution

Question 7

Almost all the oxygen in Earth's atmosphere is unique among the planets in our solar system.

Accepted Answer

A) True 
 B)False

Question 8

What is the percentage of Earth's atmosphere (by volume)that is carbon dioxide (CO₂)?

Accepted Answer

A)  78 
B)  21 
C)  3 
D)  0.9 
E)  0.03 
A)  78 
B)  21 
C)  3 
D)  0.9 
E)  0.03

Question 9

Arrange the layers of the Earth from the core outward,describing their major materials.

Accepted Answer

The inner core is solid nickel and iron,

Question 10

What does it mean when we say the Earth's interior is differentiated?

Accepted Answer

In a molten state,the denser m

Question 11

A hot,molten body of different materials will become ________.

Accepted Answer

The answer of A hot,molten body of different materials will...

Question 12

The Dynamo Theory holds that:

Accepted Answer

A)  lightning plays a major role in generating our magnetic fields. 
B)  any other planet of similar density will also have a strong magnetic field. 
C)  the Earth's core, like Mercury's, is now a solid, rigid bar magnet. 
D)  magnetic fields are generated by rapidly spinning, fluid magnetic interiors. 
E)  the Earth's magnetic field must switch polarities every few million years. 
A)  lightning plays a major role in generating our magnetic fields. 
B)  any other planet of similar density will also have a strong magnetic field. 
C)  the Earth's core, like Mercury's, is now a solid, rigid bar magnet. 
D)  magnetic fields are generated by rapidly spinning, fluid magnetic interiors. 
E)  the Earth's magnetic field must switch polarities every few million years.

Question 13

Describe the two different kinds of seismic waves.Distinguish between them by describing how they move through Earth's interior.

Accepted Answer

S-waves cause side-to-side motion.These

Question 14

Which parts of the Sun's radiation are responsible for heating Earth's surface?

Accepted Answer

A)  the radio and the ultraviolet 
B)  the X-ray and the gamma ray 
C)  the ultraviolet and the visible 
D)  the visible and the infrared 
E)  the infrared and the high energy particles 
A)  the radio and the ultraviolet 
B)  the X-ray and the gamma ray 
C)  the ultraviolet and the visible 
D)  the visible and the infrared 
E)  the infrared and the high energy particles

Question 15

The Greenhouse Effect works by trapping:

Accepted Answer

A)  incoming ultraviolet radiation from the Sun. 
B)  outgoing ultraviolet radiation from the Earth. 
C)  incoming infrared radiation from the Sun. 
D)  outgoing infrared radiation from the Earth. 
E)  the heat from the Sun in Earth's atmosphere. 
A)  incoming ultraviolet radiation from the Sun. 
B)  outgoing ultraviolet radiation from the Earth. 
C)  incoming infrared radiation from the Sun. 
D)  outgoing infrared radiation from the Earth. 
E)  the heat from the Sun in Earth's atmosphere.

Question 16

Which of these is NOT a product of plate tectonics and hot spots?

Accepted Answer

A)  Hawaii 
B)  Yellowstone and Old Faithful 
C)  the Mid Atlantic Rift 
D)  the Andes 
E)  the Grand Canyon's eroded depths 
A)  Hawaii 
B)  Yellowstone and Old Faithful 
C)  the Mid Atlantic Rift 
D)  the Andes 
E)  the Grand Canyon's eroded depths

Question 17

The oldest rocks found on the Earth's surface date back about ________ billion years.

Accepted Answer

The answer of The oldest rocks found on the Earth's...

Question 18

When strong solar winds are displaced poleward by our magnetic fields,we get:

Accepted Answer

A)  the Van Allen radiation belts. 
B)  intense auroral displays. 
C)  sunspots. 
D)  hurricanes in the tropics. 
E)  droughts and dust bowls in the American West. 
A)  the Van Allen radiation belts. 
B)  intense auroral displays. 
C)  sunspots. 
D)  hurricanes in the tropics. 
E)  droughts and dust bowls in the American West.

Question 19

The principal greenhouse gases in our present atmosphere are:

Accepted Answer

A)  hydrogen and helium. 
B)  hydrogen sulfide and carbon disulfide. 
C)  water vapor and carbon dioxide. 
D)  methane and ammonia. 
E)  sulfuric acid vapor and carbon dioxide. 
A)  hydrogen and helium. 
B)  hydrogen sulfide and carbon disulfide. 
C)  water vapor and carbon dioxide. 
D)  methane and ammonia. 
E)  sulfuric acid vapor and carbon dioxide.

Question 20

Subduction of higher density oceanic plates under the continents not only creates deep trenches but also tall volcanic chains ashore as well.

Accepted Answer

A) True 
 B)False

Exam 7: Earth: Our Home in Space

In noting that our world is "differentiated," we mean that:

Greenhouse gases in our atmosphere trap just enough heat to keep the Earth's oceans liquid.

Clouds form primarily at the boundary between:

The relative size of the mantle of Earth compared to the solid inner core of Earth is most similar to:

From the center outward,the correct order is:

What event triggered the dramatic increase in atmospheric carbon dioxide concentration seen over the last couple of centuries?

Almost all the oxygen in Earth's atmosphere is unique among the planets in our solar system.

What is the percentage of Earth's atmosphere (by volume)that is carbon dioxide (CO₂)?

Arrange the layers of the Earth from the core outward,describing their major materials.

What does it mean when we say the Earth's interior is differentiated?

A hot,molten body of different materials will become ________.

The Dynamo Theory holds that:

Describe the two different kinds of seismic waves.Distinguish between them by describing how they move through Earth's interior.

Which parts of the Sun's radiation are responsible for heating Earth's surface?

The Greenhouse Effect works by trapping:

Which of these is NOT a product of plate tectonics and hot spots?

The oldest rocks found on the Earth's surface date back about ________ billion years.

When strong solar winds are displaced poleward by our magnetic fields,we get:

The principal greenhouse gases in our present atmosphere are:

Subduction of higher density oceanic plates under the continents not only creates deep trenches but also tall volcanic chains ashore as well.

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information from the Cosmos

Spectroscopy: The Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earth's Sister Planet

Mars: A Near Miss for Life?

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants,Dwarfs,and the Main Sequence

The Interstellar Medium: Gas and Dust among the Stars

Star Formation: A Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae,Supernovae,and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: A Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone?

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