Question 1

High _____ is usually an indication of a magma body or still-cooling pluton near the surface.

Accepted Answer

A) geothermal gradient 
B) heat loss 
C) convection 
D) conduction 
E) heat flow 
A) geothermal gradient 
B) heat loss 
C) convection 
D) conduction 
E) heat flow

Question 2

_____ predicts that the higher a mountain range extends above sea level the deeper it extends into the mantle.

Accepted Answer

A) Isostatic adjustment 
B) Crustal rebound 
C) Mantle convection 
D) Mohorovicic discontinuity 
E) Subducting oceanic lithosphere 
A) Isostatic adjustment 
B) Crustal rebound 
C) Mantle convection 
D) Mohorovicic discontinuity 
E) Subducting oceanic lithosphere

Question 3

The average density of the Earth is 2.7 gm/cm3.

Accepted Answer

A) True 
 B)False

Question 4

The boundary between the core and the mantle is marked by great changes in ____.

Accepted Answer

A) seismic velocity 
B) density 
C) temperature 
D) Both seismic velocity and density are correct. 
E) Seismic velocity,density,and temperature are all correct. 
A) seismic velocity 
B) density 
C) temperature 
D) Both seismic velocity and density are correct. 
E) Seismic velocity,density,and temperature are all correct.

Question 5

The upper mantle consists of _______.

Accepted Answer

A) granite 
B) basalt 
C) ultramafic rocks 
D) metamorphic rocks 
E) sedimentary rocks 
A) granite 
B) basalt 
C) ultramafic rocks 
D) metamorphic rocks 
E) sedimentary rocks

Question 6

The Moho separates the crust from the mantle.

Accepted Answer

A) True 
 B)False

Question 7

A gravity meter registers _____ over ore bodies.

Accepted Answer

A) zero gravity readings 
B) constant gravity 
C) decreased gravity 
D) increased gravity 
E) You can't explore for metallic deposits with a gravity meter. 
A) zero gravity readings 
B) constant gravity 
C) decreased gravity 
D) increased gravity 
E) You can't explore for metallic deposits with a gravity meter.

Question 8

As lava cools below the _____ point,a record of the Earth's magnetic field is permanently trapped in the rock.

Accepted Answer

A) freezing 
B) burning 
C) boiling 
D) melting 
E) Curie 
A) freezing 
B) burning 
C) boiling 
D) melting 
E) Curie

Question 9

A region held down out of isostatic equilibrium produces a negative gravity anomaly.

Accepted Answer

A) True 
 B)False

Question 10

A gravity reading lower than the normal regional gravity indicates that a region is ____.

Accepted Answer

A) actively being uplifted 
B) under a high magnetic field 
C) being held down 
D) a good prospect for an ore deposit 
E) undergoing elastic rebound 
A) actively being uplifted 
B) under a high magnetic field 
C) being held down 
D) a good prospect for an ore deposit 
E) undergoing elastic rebound

Question 11

Geologists study the composition of the Earth's crust using deep drill holes.

Accepted Answer

A) True 
 B)False

Question 12

The bending of seismic waves as they pass from one material to another is called seismic ____.

Accepted Answer

A) refraction 
B) reflection 
C) deflection 
D) attenuation 
E) waves don't bend when they pass through different materials. 
A) refraction 
B) reflection 
C) deflection 
D) attenuation 
E) waves don't bend when they pass through different materials.

Question 13

One widely accepted hypothesis is that the Earth's magnetic field is created by electric currents within the ______.

Accepted Answer

A) asthenosphere 
B) crust 
C) lower mantle 
D) liquid outer core 
E) sun 
A) asthenosphere 
B) crust 
C) lower mantle 
D) liquid outer core 
E) sun

Question 14

The boundary that separates the crust from the mantle is the ____.

Accepted Answer

A) mantle discontinuity 
B) Mohorovicic discontinuity 
C) lithospheric discontinuity 
D) athenospheric discontinuity 
E) shadow zone 
A) mantle discontinuity 
B) Mohorovicic discontinuity 
C) lithospheric discontinuity 
D) athenospheric discontinuity 
E) shadow zone

Question 15

Hot mantle rock rising slowly by convection under parts of the ocean explains ____.

Accepted Answer

A) mid-oceanic ridges 
B) underwater volcanoes 
C) the unexpectedly high heat flow under the oceans 
D) the thickness of the continents 
E) the location of earthquakes 
A) mid-oceanic ridges 
B) underwater volcanoes 
C) the unexpectedly high heat flow under the oceans 
D) the thickness of the continents 
E) the location of earthquakes

Question 16

Geologists think that the asthenosphere is molten.

Accepted Answer

A) True 
 B)False

Question 17

Detailed images provided by _____ suggest that the mantle is heterogeneous,probably due to variations in temperature,composition,and density.

Accepted Answer

A) p-waves 
B) shadow zone 
C) deep drill holes 
D) seismic reflection 
E) seismic tomography 
A) p-waves 
B) shadow zone 
C) deep drill holes 
D) seismic reflection 
E) seismic tomography

Question 18

Seismic tomography uses earthquake waves and computers to study cross sections of the mantle.

Accepted Answer

A) True 
 B)False

Question 19

Recently,geologists have been analyzing ____ generated by tidal friction,ocean waves,and storms to gain an even more detailed image of the crust and upper mantle.

Accepted Answer

A) energy waves 
B) light sources 
C) water movement 
D) evaporation 
E) ocean currents 
A) energy waves 
B) light sources 
C) water movement 
D) evaporation 
E) ocean currents

Question 20

Seismic P-waves _____ through continental crust relative to oceanic crust.

Accepted Answer

A) travel faster 
B) travel slower 
C) stay the same velocity 
D) are refracted 
E) are reflected 
A) travel faster 
B) travel slower 
C) stay the same velocity 
D) are refracted 
E) are reflected

Exam 2: Earths Interior and Geophysical Properties

High _____ is usually an indication of a magma body or still-cooling pluton near the surface.

_____ predicts that the higher a mountain range extends above sea level the deeper it extends into the mantle.

The average density of the Earth is 2.7 gm/cm3.

The boundary between the core and the mantle is marked by great changes in ____.

The upper mantle consists of _______.

The Moho separates the crust from the mantle.

A gravity meter registers _____ over ore bodies.

As lava cools below the _____ point,a record of the Earth's magnetic field is permanently trapped in the rock.

A region held down out of isostatic equilibrium produces a negative gravity anomaly.

A gravity reading lower than the normal regional gravity indicates that a region is ____.

Geologists study the composition of the Earth's crust using deep drill holes.

The bending of seismic waves as they pass from one material to another is called seismic ____.

One widely accepted hypothesis is that the Earth's magnetic field is created by electric currents within the ______.

The boundary that separates the crust from the mantle is the ____.

Hot mantle rock rising slowly by convection under parts of the ocean explains ____.

Geologists think that the asthenosphere is molten.

Detailed images provided by _____ suggest that the mantle is heterogeneous,probably due to variations in temperature,composition,and density.

Seismic tomography uses earthquake waves and computers to study cross sections of the mantle.

Recently,geologists have been analyzing ____ generated by tidal friction,ocean waves,and storms to gain an even more detailed image of the crust and upper mantle.

Seismic P-waves _____ through continental crust relative to oceanic crust.

Introducing Geology,the Essentials of Plate Tectonics,and Other Important Concepts

The Sea Floor

Plate Tectonics

Mountain Belts and the Continental Crust

Geologic Structures

Earthquakes

Time and Geology

Atoms,Elements and Minerals

Volcanism and Extrusive Rocks

Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks

Weathering and Soil

Mass Wasting

Sediment and Sedimentary Rocks

Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks

Streams and Floods

Ground Water

Deserts and Wind Action

Glaciers and Glaciation

Waves,Beaches and Coasts

Geologic Resources

The Earths Companions

Filters

The average density of the Earth is 2.7 gm/cm³.