Question 1

The fact that Earth's interior is differentiated suggests that

Accepted Answer

A)  it formed first from denser material and then afterward accreted lighter material. 
B)  it has both a liquid and solid core. 
C)  it was liquid at some point in the past. 
D)  only the crust is solid;the rest of Earth's interior is liquid. 
A)  it formed first from denser material and then afterward accreted lighter material. 
B)  it has both a liquid and solid core. 
C)  it was liquid at some point in the past. 
D)  only the crust is solid;the rest of Earth's interior is liquid. C

Question 2

Which of the following is NOT a requirement for a planetary magnetic dynamo?

Accepted Answer

A)  Rapid rotation 
B)  Solid iron core 
C)  Convective motions 
D)  Electrically conducting liquid in the core 
A)  Rapid rotation 
B)  Solid iron core 
C)  Convective motions 
D)  Electrically conducting liquid in the core B

Question 3

Which of the following is NOT a factor that helps explain Earth's lack of craters compared to the Moon?

Accepted Answer

A)  Wind erosion 
B)  Larger atmosphere 
C)  Higher density interior 
D)  Liquid water on surface 
A)  Wind erosion 
B)  Larger atmosphere 
C)  Higher density interior 
D)  Liquid water on surface C

Question 4

Which of the following will NOT be a consequence of Earth's consumption of the bulk of its radioactive "fuel" in the future?

Accepted Answer

A)  Earth will spin more slowly on its axis. 
B)  The interior of the planet will solidify. 
C)  Volcanic activity will cease. 
D)  Continental drift will no longer occur. 
A)  Earth will spin more slowly on its axis. 
B)  The interior of the planet will solidify. 
C)  Volcanic activity will cease. 
D)  Continental drift will no longer occur.

Question 5

Which is denser,the mantle of Earth or its crust? Explain why.

Accepted Answer

Because Earth's mantle is liquid,differe

Question 6

Give a specific example of impacts of asteroids/comets that have happened on Earth.Why are impact craters rare on the surface of Earth,but plentiful on the Moon?

Accepted Answer

Examples of impacts on Earth are Meteor

Question 7

On Mars,water ice is present primarily in its polar ice caps.

Accepted Answer

A) True 
 B)False

Question 8

The age of the Solar System can be determined most accurately by

Accepted Answer

A)  measuring the number of craters per square meter on Mercury. 
B)  radioactive dating of rocks retrieved from the Moon. 
C)  carbon dating of rocks from mountains on the Earth. 
D)  measurement of the magnetic field variations on the sea floor. 
A)  measuring the number of craters per square meter on Mercury. 
B)  radioactive dating of rocks retrieved from the Moon. 
C)  carbon dating of rocks from mountains on the Earth. 
D)  measurement of the magnetic field variations on the sea floor.

Question 9

Earth's magnetic axis and its spin axis are not aligned.

Accepted Answer

A) True 
 B)False

Question 10

Earth's innermost core is solid,not liquid,because

Accepted Answer

A)  the core temperature is too low to melt iron. 
B)  differentiation caused all of the heavy,solid material to sink to the bottom while Earth was forming. 
C)  all the liquid has moved up into the mantle via convection. 
D)  the pressure is too high for a liquid state. 
A)  the core temperature is too low to melt iron. 
B)  differentiation caused all of the heavy,solid material to sink to the bottom while Earth was forming. 
C)  all the liquid has moved up into the mantle via convection. 
D)  the pressure is too high for a liquid state.

Question 11

Volcanoes on Earth typically occur in the middle of oceans where two tectonic plates move farther apart.

Accepted Answer

A) True 
 B)False

Question 12

The interior of the Earth is hot mainly because of the pressure induced by the weight of the material above it.

Accepted Answer

A) True 
 B)False

Question 13

According to studies of impact cratering,which of the terrestrial planets has the oldest surface?

Accepted Answer

A)  Mercury 
B)  Venus 
C)  Earth 
D)  Mars 
A)  Mercury 
B)  Venus 
C)  Earth 
D)  Mars

Question 14

There are two main forces that shape a planet's surface: impacts and plate tectonics.

Accepted Answer

A) True 
 B)False

Question 15

Plate tectonics is NOT responsible for the formation of

Accepted Answer

A)  mountain ranges. 
B)  canyons. 
C)  volcanoes. 
D)  ocean trenches. 
A)  mountain ranges. 
B)  canyons. 
C)  volcanoes. 
D)  ocean trenches.

Question 16

Differentiation refers to materials that are separate based on their

Accepted Answer

A)  weight. 
B)  mass. 
C)  volume. 
D)  density. 
A)  weight. 
B)  mass. 
C)  volume. 
D)  density.

Question 17

All the terrestrial planets show evidence of disruptions due to tectonics.

Accepted Answer

A) True 
 B)False

Question 18

The North American plate and the Pacific plate are sliding past one another at a rate of approximately 3 cm/year.San Francisco,which is located on the edge of the North American plate,is sliding southward toward Los Angles,which is located on the Pacific Plate.If they are currently separated by a distance of 600 km,how many years will it take for the two cities to meet?

Accepted Answer

A)  3 million years 
B)  300,000 years 
C)  20 million years 
D)  20,000 years 
A)  3 million years 
B)  300,000 years 
C)  20 million years 
D)  20,000 years

Question 19

To cause continent-wide damage to Earth's surface,an asteroid impacting Earth must be

Accepted Answer

A)  at least 1 meter in size. 
B)  at least 10 meters in size. 
C)  at least 1 kilometer in size. 
D)  at least 1,000 kilometers in size. 
A)  at least 1 meter in size. 
B)  at least 10 meters in size. 
C)  at least 1 kilometer in size. 
D)  at least 1,000 kilometers in size.

Question 20

How are the volcanoes on Venus and Mars different from the volcanoes on the Earth? What might explain this difference?

Accepted Answer

Venus and Mars have many more shield vol

Exam 7: The Terrestrial Planets and Earths Moon

The fact that Earth's interior is differentiated suggests that

Which of the following is NOT a requirement for a planetary magnetic dynamo?

Which of the following is NOT a factor that helps explain Earth's lack of craters compared to the Moon?

Which of the following will NOT be a consequence of Earth's consumption of the bulk of its radioactive "fuel" in the future?

Which is denser,the mantle of Earth or its crust? Explain why.

Give a specific example of impacts of asteroids/comets that have happened on Earth.Why are impact craters rare on the surface of Earth,but plentiful on the Moon?

On Mars,water ice is present primarily in its polar ice caps.

The age of the Solar System can be determined most accurately by

Earth's magnetic axis and its spin axis are not aligned.

Earth's innermost core is solid,not liquid,because

Volcanoes on Earth typically occur in the middle of oceans where two tectonic plates move farther apart.

The interior of the Earth is hot mainly because of the pressure induced by the weight of the material above it.

According to studies of impact cratering,which of the terrestrial planets has the oldest surface?

There are two main forces that shape a planet's surface: impacts and plate tectonics.

Plate tectonics is NOT responsible for the formation of

Differentiation refers to materials that are separate based on their

All the terrestrial planets show evidence of disruptions due to tectonics.

To cause continent-wide damage to Earth's surface,an asteroid impacting Earth must be

How are the volcanoes on Venus and Mars different from the volcanoes on the Earth? What might explain this difference?

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbitsa Celestial Ballet

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquidthe Giant Planets

Gravity Is More Than Keplers Laws

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

A Run-Of-The-Mill G-Type Starour Sun

Star Formation and the Interstellar Medium

Stars in the Slow Lanelow-Mass Stellar Evolution

Live Fast,die Younghigh-Mass Stellar Evolution

Our Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

The Origin of Structure

Life

Filters