Question 1

Based on seismic tomographic images,how deep do subducting slabs extend?

Accepted Answer

A) to the crust-mantle boundary 
B) to the upper mantle-lower mantle boundary 
C) to the core-mantle boundary 
D) to the inner core-outer core boundary 
A) to the crust-mantle boundary 
B) to the upper mantle-lower mantle boundary 
C) to the core-mantle boundary 
D) to the inner core-outer core boundary C

Question 2

Which of the following regions in Earth consists primarily of olivine and pyroxene?

Accepted Answer

A) the crust 
B) the upper mantle 
C) the lower mantle 
D) the inner core 
A) the crust 
B) the upper mantle 
C) the lower mantle 
D) the inner core B

Question 3

William Gilbert,the physician of Queen Elizabeth I,was the first to suggest that

Accepted Answer

A) Earth had a dipole magnetic field. 
B) gravity varied over the surface of Earth. 
C) isostacy worked for the crust. 
D) oceanic depth was related to seafloor age. 
A) Earth had a dipole magnetic field. 
B) gravity varied over the surface of Earth. 
C) isostacy worked for the crust. 
D) oceanic depth was related to seafloor age. A

Question 4

How fast do P waves travel through granite?

Accepted Answer

A) 4 kilometers per second 
B) 6 kilometers per second 
C) 8 kilometers per second 
D) 12 kilometers per second 
A) 4 kilometers per second 
B) 6 kilometers per second 
C) 8 kilometers per second 
D) 12 kilometers per second

Question 5

If Earth's magnetic field disappeared,then

Accepted Answer

A) seafloor spreading would cease. 
B) continental drift would stop. 
C) the atmosphere would be blown away by the solar wind. 
D) volcanic activity would increase. 
A) seafloor spreading would cease. 
B) continental drift would stop. 
C) the atmosphere would be blown away by the solar wind. 
D) volcanic activity would increase.

Question 6

Variations in the pull of gravity at the surface of Earth are linked to

Accepted Answer

A) variations in latitude. 
B) variations in the liquid outer core. 
C) variations in lithospheric densities. 
D) variations in the mantle temperature. 
A) variations in latitude. 
B) variations in the liquid outer core. 
C) variations in lithospheric densities. 
D) variations in the mantle temperature.

Question 7

Which of the following foods would best serve a proxy for Earth's layering?

Accepted Answer

A) apple 
B) orange 
C) peach 
D) onion 
A) apple 
B) orange 
C) peach 
D) onion

Question 8

Approximately how often does Earth's magnetic field reverse itself?

Accepted Answer

A) every 50 years 
B) every 5000 years 
C) every 500,000 years 
D) every 50,000,000 years 
A) every 50 years 
B) every 5000 years 
C) every 500,000 years 
D) every 50,000,000 years

Question 9

Which of the following seismic waves will arrive at a seismograph first?

Accepted Answer

A) P 
B) S 
C) PP 
D) SS 
A) P 
B) S 
C) PP 
D) SS

Question 10

Continental crust beneath mountains can be up to ___ kilometers thick.

Accepted Answer

A) 10 
B) 40 
C) 70 
D) 100 
A) 10 
B) 40 
C) 70 
D) 100

Question 11

Which of the following regions is hottest?

Accepted Answer

A) the crust 
B) the inner core 
C) the mantle 
D) the outer core 
A) the crust 
B) the inner core 
C) the mantle 
D) the outer core

Question 12

What cause large-scale variations in Earth's geoid?

Accepted Answer

A) variations in gravity 
B) variations in radioactivity 
C) variations in magnetism 
D) variations in solar energy 
A) variations in gravity 
B) variations in radioactivity 
C) variations in magnetism 
D) variations in solar energy

Question 13

What element makes up most of Earth's core?

Accepted Answer

A) iron 
B) oxygen 
C) magnesium 
D) silicon 
A) iron 
B) oxygen 
C) magnesium 
D) silicon

Question 14

Which portion of the mantle is relatively free of seismic discontinuities?

Accepted Answer

A) 30 to 100 km 
B) 100 to 400 km 
C) 400 to 1000 km 
D) 1000 to 2500 km 
A) 30 to 100 km 
B) 100 to 400 km 
C) 400 to 1000 km 
D) 1000 to 2500 km

Question 15

What causes the sharp increases in the velocity of S waves at a depth of 400 and 660 km in the mantle?

Accepted Answer

A) changes in the composition of the mantle 
B) changes in the mineral structures 
C) changes in the pressure of the mantle 
D) changes in the temperature of the mantle 
A) changes in the composition of the mantle 
B) changes in the mineral structures 
C) changes in the pressure of the mantle 
D) changes in the temperature of the mantle

Question 16

Recently scientists have suggested that __________,thus acting like a "planet within a planet."

Accepted Answer

A) mantle spins faster than the core 
B) outer core spins faster than the mantle 
C) inner core spins faster than the mantle 
D) lower mantle spins faster than the outer core 
A) mantle spins faster than the core 
B) outer core spins faster than the mantle 
C) inner core spins faster than the mantle 
D) lower mantle spins faster than the outer core

Question 17

Which of the following regions is the source of most basaltic magma?

Accepted Answer

A) the asthenosphere 
B) the lithosphere 
C) the lower mantle 
D) the outer core 
A) the asthenosphere 
B) the lithosphere 
C) the lower mantle 
D) the outer core

Question 18

Over time,the size of the inner core will __________ and the size of the outer core will __________.

Accepted Answer

A) grow; grow 
B) shrink; shrink 
C) shrink; grow 
D) grow; shrink 
A) grow; grow 
B) shrink; shrink 
C) shrink; grow 
D) grow; shrink

Question 19

Which of the following statements about the Mohorovičić discontinuity (Moho)is false?

Accepted Answer

A) The Moho marks the top of a partially molten layer. 
B) The Moho separates denser rocks below from less dense rocks above. 
C) The Moho separates the crust from the mantle. 
D) The speed of seismic waves increases as they pass down through the Moho. 
A) The Moho marks the top of a partially molten layer. 
B) The Moho separates denser rocks below from less dense rocks above. 
C) The Moho separates the crust from the mantle. 
D) The speed of seismic waves increases as they pass down through the Moho.

Question 20

The oceanic crust consists mostly of

Accepted Answer

A) felsic rocks. 
B) mafic rocks. 
C) sedimentary rocks. 
D) ultramafic rocks. 
A) felsic rocks. 
B) mafic rocks. 
C) sedimentary rocks. 
D) ultramafic rocks.

Exam 14: Exploring Earths Interior

Based on seismic tomographic images,how deep do subducting slabs extend?

Which of the following regions in Earth consists primarily of olivine and pyroxene?

William Gilbert,the physician of Queen Elizabeth I,was the first to suggest that

How fast do P waves travel through granite?

If Earth's magnetic field disappeared,then

Variations in the pull of gravity at the surface of Earth are linked to

Which of the following foods would best serve a proxy for Earth's layering?

Approximately how often does Earth's magnetic field reverse itself?

Which of the following seismic waves will arrive at a seismograph first?

Continental crust beneath mountains can be up to ___ kilometers thick.

Which of the following regions is hottest?

What cause large-scale variations in Earth's geoid?

What element makes up most of Earth's core?

Which portion of the mantle is relatively free of seismic discontinuities?

What causes the sharp increases in the velocity of S waves at a depth of 400 and 660 km in the mantle?

Recently scientists have suggested that __________,thus acting like a "planet within a planet."

Which of the following regions is the source of most basaltic magma?

Over time,the size of the inner core will __________ and the size of the outer core will __________.

Which of the following statements about the Mohorovičić discontinuity (Moho)is false?

The oceanic crust consists mostly of

The Earth System

Plate Tectonics: The Unifying Theory

Earth Materials: Minerals and Rocks

Igneous Rocks: Solids From Melts

Sedimentation: Rocks Formed by Surface Processes

Metamorphism: Alteration of Rocks by Temperature and Pressure

Deformation: Modification of Rocks by Folding and Fracturing

Clocks in Rocks: Timing the Geologic Period

Early History of the Terrestrial Planets

History of the Continents

Geobiology: Life Interacts With Earth

Volcanoes

Earthquakes

The Climate System

Weathering,erosion,and Mass Wasting: Interactions Between the Climate and Plate Tectonic Systems

The Hydrologic Cycle and Groundwater

Stream Transport: From Mountains to Oceans

Winds and Deserts

Coastlines and Ocean Basins

Glaciers: the Work of Ice

Landscapes: Tectonic and Climate Interaction

The Human Impact of Earths Environment

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Over time,the size of the inner core will and the size of the outer core will .