Question 1

Magnetosphere refers to

Accepted Answer

The magnetosphere is the region surrounding Earth where its magnetic field dominates, protecting the planet from solar wind and cosmic radiation.

Question 2

The large feature spanning the planet ________ shown in the figure below is called ________.

Accepted Answer

The answer of The large feature spanning the planet ________...

Question 3

What will eventually happen to Earth when radioactive decays in its interior cease?

Accepted Answer

When radioactive decay in Earth's interior ceases, it will lead to a cooling of the planet's interior, causing the core to solidify, continental drift and earthquakes to cease, and a decrease in the strength of Earth's magnetic field.

Question 4

What would you study in order to determine the timescale on which Earth's magnetic field reverses direction?

Accepted Answer

The study of spreading centers on the sea floor, where new crust is formed, allows scientists to examine the patterns of magnetic stripes that record Earth's magnetic field reversals over time.

Question 5

Consider an external solar system in which there are three terrestrial planets.All are located far from other objects, so tidal forces aren't significant.If planet A has a radius of 1 Earth
Radius, planet B has a radius of 2 Earth radii, and planet C has a radius of 3 Earth radii, which
Planet has the highest chance of having at least a partially liquid core and a detectable
Magnetic field?

Accepted Answer

Larger planets like planet C are more likely to retain internal heat, which can keep their cores partially liquid and generate a magnetic field.

Question 6

A rising convection cell in the mantle gives rise to

Accepted Answer

A rising convection cell in the mantle causes the lithosphere to move apart, leading to the formation of separating plates, which is characteristic of divergent boundaries.

Question 7

Based on the assumption that a liquid-conducting core and rapid rotation both are required for a magnetic dynamo to operate, which terrestrial planets would you expect to have magnetic fields?

Accepted Answer

Earth is the only terrestrial planet that has a liquid-conducting core and rapid rotation, which are both required for a magnetic dynamo to operate.

Question 8

Continental drift occurs at a typical rate of a few

Accepted Answer

Continental drift occurs at a typical rate of a few centimeters per year, as tectonic plates slowly move over the Earth's surface.

Question 9

The Moon has a diameter that is approximately one-fourth that of Earth.If these objects' interiors are heated by radioactive decays and the total amount of energy in decays is proportional to the object's volume, how does the amount of internal heat the Moon has compare to that of Earth?

Accepted Answer

The volume of a sphere is proportional to the cube of its diameter. Since the Moon's diameter is 1/4 of Earth's, its volume is (1/4)^3 = 1/64 of Earth's. Thus, the Moon's heating rate is 1/64 times that of Earth's.

Question 10

Which of the following is a requirement for a planetary magnetic dynamo?

Accepted Answer

A planetary magnetic dynamo requires a liquid interior, typically a molten metal core, which allows for the movement of conductive materials to generate a magnetic field through the process of convection and rotation.

Question 11

Plate tectonics is NOT responsible for

Accepted Answer

Canyons are formed by erosion, not by plate tectonics.

Question 12

The figure below depicts

Accepted Answer

The answer of The figure below depicts 
...

Question 13

The dynamo theory says that a planet will have a strong magnetic field if it has

Accepted Answer

The dynamo theory suggests that a strong magnetic field is generated by the motion of conducting fluids within a planet's core. Fast rotation and a liquid core facilitate the necessary fluid motion and convection currents to sustain a magnetic field.

Question 14

Which terrestrial planet has the strongest magnetic field?

Accepted Answer

Earth has the strongest magnetic field among the terrestrial planets.

Question 15

The large feature spanning the surface of Mars shown in the figure below is ________ and probably was created by ________.

Accepted Answer

The answer of The large feature spanning the surface of...

Question 16

A(n) ________ is a location on Earth that experiences frequent volcanic activity.

Accepted Answer

A local hot spot is an area where magma from deep within the Earth's mantle rises to the surface, often resulting in frequent volcanic activity.

Question 17

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

Accepted Answer

The answer of The North American Plate and the Pacific...

Question 18

Mars has a diameter that is approximately half that of Earth's.If the interiors of these planets are heated by radioactive decays, how does the heating rate of the interior of Mars compare to that of Earth?

Accepted Answer

The heating rate is related to the volume-to-surface area ratio. Since Mars has a smaller volume relative to its surface area compared to Earth, its heating rate is lower. Given that Mars's diameter is half of Earth's, its volume is 1/8th, and its surface area is 1/4th of Earth's, leading to a heating rate of 0.125 times that of Earth.

Question 19

If the Himalayan mountain range is presently 8,000 m in height and is rising at a rate of 0.5 m per century because of the convergence of two continental plates, how long did it take to create this mountain range?

Accepted Answer

To find the time it took to create the mountain range, divide the current height (8,000 m) by the rate of rise (0.5 m per century). This gives 8,000 / 0.5 = 16,000 centuries, which is equivalent to 1.6 million years.

Question 20

The figure below depicts

Accepted Answer

The answer of The figure below depicts 
...

Quiz 8: The Terrestrial Planets and Earths Moon

Magnetosphere refers to

The large feature spanning the planet shown in the figure below is called .

What will eventually happen to Earth when radioactive decays in its interior cease?

What would you study in order to determine the timescale on which Earth's magnetic field reverses direction?

A rising convection cell in the mantle gives rise to

Based on the assumption that a liquid-conducting core and rapid rotation both are required for a magnetic dynamo to operate, which terrestrial planets would you expect to have magnetic fields?

Continental drift occurs at a typical rate of a few

The Moon has a diameter that is approximately one-fourth that of Earth.If these objects' interiors are heated by radioactive decays and the total amount of energy in decays is proportional to the object's volume, how does the amount of internal heat the Moon has compare to that of Earth?

Which of the following is a requirement for a planetary magnetic dynamo?

Plate tectonics is NOT responsible for

The figure below depicts

The dynamo theory says that a planet will have a strong magnetic field if it has

Which terrestrial planet has the strongest magnetic field?

The large feature spanning the surface of Mars shown in the figure below is and probably was created by .

A(n) ________ is a location on Earth that experiences frequent volcanic activity.

Mars has a diameter that is approximately half that of Earth's.If the interiors of these planets are heated by radioactive decays, how does the heating rate of the interior of Mars compare to that of Earth?

If the Himalayan mountain range is presently 8,000 m in height and is rising at a rate of 0.5 m per century because of the convergence of two continental plates, how long did it take to create this mountain range?

The figure below depicts