Question 1

Explain why convection is more rapid in shallow parts of the mantle as compared to deep parts of the mantle.

Accepted Answer

Both parts of the mantle experience convection but the speed is faster in zones that are located 660 kilometers in depth where there is less pressure. Below the 660 kilometers, the convection is sluggish primarily due to more pressure.

Question 2

Explain how the work of Vine, Matthews, and Morely supported Harry Hess's hypothesis of sea floor spreading.

Accepted Answer

The validated that the seafloor and oceanic crust become older with increase distance from the Mid Oceanic Ridge exactly as Hess described in his publications. In addition, Hess noted that guyots got progressively older as they got closer to subduction zones which is caused by seafloor spreading.

Question 3

Which layer of the Earth makes up 80% of Earth's volume? ___________________

Accepted Answer

A)  Lithosphere 
B)  Mantle 
C)  Outer core 
D)  Inner Core 
A)  Lithosphere 
B)  Mantle 
C)  Outer core 
D)  Inner Core B

Question 4

Explain how new ocean basis are formed on Earth.

Accepted Answer

Rift zones, divergent plate boundaries o

Question 5

When a plate carrying continental crust converges with a plate carrying oceanic crust _________.

Accepted Answer

A)  the oceanic plate floats above the continental plate 
B)  the continental plate sinks into the mantle 
C)  a divergent boundary forms 
D)  the oceanic plate sinks beneath the continental plate and dives into the mantle 
A)  the oceanic plate floats above the continental plate 
B)  the continental plate sinks into the mantle 
C)  a divergent boundary forms 
D)  the oceanic plate sinks beneath the continental plate and dives into the mantle

Question 6

If you were a geologists studying the Himalayan Mountain Range, you would be examining what specific type of plate boundary?

Accepted Answer

A)  convergent 
B)  divergent 
C)  transform 
D)  rift valley 
A)  convergent 
B)  divergent 
C)  transform 
D)  rift valley

Question 7

Which of the following provided evidence for Wegener's theory?

Accepted Answer

A)  differences in sea level heights 
B)  Earth's internal pressure changes 
C)  fossil records 
D)  magnetic polarity 
A)  differences in sea level heights 
B)  Earth's internal pressure changes 
C)  fossil records 
D)  magnetic polarity

Question 8

Geologist who studies the Pacific Northwest, Northern California, Oregon, and British Columbia are examining what specific type of plate boundary? ________________

Accepted Answer

The answer of Geologist who studies the Pacific Northwest, Northern...

Question 9

The scientific community embraced Wegener's supercontinent theory because he was able to prove how continents drifted in geologic past.

Accepted Answer

A) True 
 B)False

Question 10

Explain why the fossil evidence that Wegener compiled supported his theory of continental drift.

Accepted Answer

Wegener gathered data regarding location

Question 11

Explain why the inner core is not molten even though it is 7000°C.

Accepted Answer

The pressure in the inner core

Question 12

Explain why the age of continental crust is older than oceanic crust.

Accepted Answer

Oceanic crust is subducted at major acti

Question 13

Explain why volcanoes are not common at transform plate boundaries.

Accepted Answer

Transform plate boundaries occur when tw

Question 14

Lithosphere is thickest at oceanic spreading centers because the ocean lithosphere crumple against each other causing a huge mountain range to form.

Accepted Answer

A) True 
 B)False

Question 15

The seafloor and oceanic crust at the Mid-Atlantic Ridge becomes _________ with increasing distance from the ridge axis.

Accepted Answer

A)  newer 
B)  thinner 
C)  older 
D)  more magnetic 
A)  newer 
B)  thinner 
C)  older 
D)  more magnetic

Question 16

A ___________________ zone occurs when a less dense plate converges with a plate of higher density.

Accepted Answer

A)  transform 
B)  rift 
C)  spreading 
D)  subduction 
A)  transform 
B)  rift 
C)  spreading 
D)  subduction

Question 17

Explain how rift zones impact supercontinents like Pangea.

Accepted Answer

Rift zones, divergent plate boundaries o

Question 18

Would pressure inhibit melting in the upper or lower mantle preventing rock from melting? __________________

Accepted Answer

The answer of Would pressure inhibit melting in the upper...

Question 19

Oceanic crust is thicker than continental crust because it is composed of granite.

Accepted Answer

A) True 
 B)False

Question 20

A single plate can carry both oceanic and continental crust because both types of plates comprise the lithosphere.

Accepted Answer

A) True 
 B)False

Exam 6: The Active Earth: Plate Tectonics

Explain why convection is more rapid in shallow parts of the mantle as compared to deep parts of the mantle.

Explain how the work of Vine, Matthews, and Morely supported Harry Hess's hypothesis of sea floor spreading.

Which layer of the Earth makes up 80% of Earth's volume? ___________________

Explain how new ocean basis are formed on Earth.

When a plate carrying continental crust converges with a plate carrying oceanic crust _________.

If you were a geologists studying the Himalayan Mountain Range, you would be examining what specific type of plate boundary?

Which of the following provided evidence for Wegener's theory?

Geologist who studies the Pacific Northwest, Northern California, Oregon, and British Columbia are examining what specific type of plate boundary? ________________

The scientific community embraced Wegener's supercontinent theory because he was able to prove how continents drifted in geologic past.

Explain why the fossil evidence that Wegener compiled supported his theory of continental drift.

Explain why the inner core is not molten even though it is 7000°C.

Explain why the age of continental crust is older than oceanic crust.

Explain why volcanoes are not common at transform plate boundaries.

Lithosphere is thickest at oceanic spreading centers because the ocean lithosphere crumple against each other causing a huge mountain range to form.

The seafloor and oceanic crust at the Mid-Atlantic Ridge becomes _________ with increasing distance from the ridge axis.

A ___________________ zone occurs when a less dense plate converges with a plate of higher density.

Explain how rift zones impact supercontinents like Pangea.

Would pressure inhibit melting in the upper or lower mantle preventing rock from melting? __________________

Oceanic crust is thicker than continental crust because it is composed of granite.

A single plate can carry both oceanic and continental crust because both types of plates comprise the lithosphere.

Earth Systems

Minerals

Rocks

Geologic Time: a Story in the Rocks

Geologic Resources

Earthquakes and the Earths Structure

Volcanoes and Plutons

Mountains

Weathering, Soil, and Erosion

Fresh Water: Streams, Lakes, Ground Water, and Wetlands

Water Resources

Glaciers and Ice Ages

Deserts and Wind

Ocean Basins

Oceans and Coastlines

The Atmosphere

Energy Balance in the Atmosphere

Moisture, Clouds, and Weather

Climate

Climate Change

Motions in the Heavens

Planets and Their Moons

Stars, Space, and Galaxies

Filters