Question 1

What will happen to a seismic wave when it is refracted?

Accepted Answer

A) The wave will be bent when passing into a material of differing density. 
B) The wave will undulate. 
C) The wave will be bounced back toward its source. 
D) Nothing will change the wave. 
A) The wave will be bent when passing into a material of differing density. 
B) The wave will undulate. 
C) The wave will be bounced back toward its source. 
D) Nothing will change the wave.

Question 2

A ________ occurs when an iron-rich fluid in the core is electrically charged and flowing, which generates a magnetic field.

Accepted Answer

A) geotherm 
B) geodynamo 
C) geophysical anomaly 
D) geosyncline 
A) geotherm 
B) geodynamo 
C) geophysical anomaly 
D) geosyncline

Question 3

Which of the following materials will allow for the fastest transmission of seismic waves?

Accepted Answer

A) Rigid, less compressible material 
B) Material that has been slightly heated 
C) Partially molten material 
D) Molten material 
A) Rigid, less compressible material 
B) Material that has been slightly heated 
C) Partially molten material 
D) Molten material

Question 4

The composition of the upper mantle is defined by ________.

Accepted Answer

A) granite 
B) quartz 
C) perovskite 
D) peridotite 
A) granite 
B) quartz 
C) perovskite 
D) peridotite

Question 5

What is chemical convection, and how does it affect the outer core?

Accepted Answer

Chemical convection occurs when differen

Question 6

The inner core has not always existed, but formed over time.Explain how conditions in the Earth changed over time to create an inner core.

Accepted Answer

When the Earth first formed, the interio

Question 7

What is the average density of oceanic crust?

Accepted Answer

A) 2.7 g/cm3 
B) 3.0 g/cm3 
C) 3.3 g/cm3 
D) 5.6 g/cm3 
A) 2.7 g/cm3 
B) 3.0 g/cm3 
C) 3.3 g/cm3 
D) 5.6 g/cm3

Question 8

Where is the highest rate of heat flow escaping the Earth's interior?

Accepted Answer

A) At mid-ocean ridges 
B) At subduction zones 
C) At volcanoes 
D) At mountain ranges 
A) At mid-ocean ridges 
B) At subduction zones 
C) At volcanoes 
D) At mountain ranges

Question 9

What is the average density of continental crust?

Accepted Answer

A) 2.7 g/cm3 
B) 3.0 g/cm3 
C) 3.3 g/cm3 
D) 5.6 g/cm3 
A) 2.7 g/cm3 
B) 3.0 g/cm3 
C) 3.3 g/cm3 
D) 5.6 g/cm3

Question 10

P waves cannot penetrate the outer core because it is liquid.

Accepted Answer

A) True 
 B)False

Question 11

Explain how a P-wave shadow will form.Between which degrees will it form?

Accepted Answer

As P waves pass through layers of differ

Question 12

In the D" layer, the portion of the mantle closest to the core-mantle Boundary is hypothesized to be partially melted because the S-wave velocities decrease by 30% when passing through it.

Accepted Answer

A) True 
 B)False

Question 13

The magnetic north pole is currently moving (toward /away from)the geographic North Pole, and the magnetic south pole is currently moving (toward /away from)the geographic South Pole.

Accepted Answer

A) toward; toward 
B) toward; away from 
C) away from; toward 
D) away from; away from 
A) toward; toward 
B) toward; away from 
C) away from; toward 
D) away from; away from

Question 14

Where is oceanic crust generated?

Accepted Answer

A) Along divergent plate boundaries 
B) Where volcanic lava meets the sea 
C) Where continents collide 
D) Where magma bodies are emplaced deep in the crust 
A) Along divergent plate boundaries 
B) Where volcanic lava meets the sea 
C) Where continents collide 
D) Where magma bodies are emplaced deep in the crust

Question 15

What materials make up Earth's core?

Accepted Answer

A) Perovskite and silica 
B) Iron and nickel 
C) Olivine and pyroxene 
D) Sulfur and aluminum 
A) Perovskite and silica 
B) Iron and nickel 
C) Olivine and pyroxene 
D) Sulfur and aluminum

Question 16

________ are responsible for the heat generated in the interior today.

Accepted Answer

A) Meteorite impacts 
B) Magma plutons 
C) Short-lived radioactive isotopes 
D) Nuclear reactions 
A) Meteorite impacts 
B) Magma plutons 
C) Short-lived radioactive isotopes 
D) Nuclear reactions

Question 17

Explain why S waves are unable to pass through the outer core.

Accepted Answer

S waves cannot pass through the outer co

Question 18

Why might there be density changes between different parts of the same layer of the planet?

Accepted Answer

A) Different materials make up different regions of the same layer. 
B) Some materials may compress when squeezed by overlying rock. 
C) Repelling forces may cause some atoms to expand. 
D) Differentiation is still separating materials into distinct interior layers. 
A) Different materials make up different regions of the same layer. 
B) Some materials may compress when squeezed by overlying rock. 
C) Repelling forces may cause some atoms to expand. 
D) Differentiation is still separating materials into distinct interior layers.

Question 19

The mantle is composed of pure nickel and iron.

Accepted Answer

A) True 
 B)False

Question 20

The inner core is shrinking.

Accepted Answer

A) True 
 B)False

Exam 12: Earths Interior

What will happen to a seismic wave when it is refracted?

A ________ occurs when an iron-rich fluid in the core is electrically charged and flowing, which generates a magnetic field.

Which of the following materials will allow for the fastest transmission of seismic waves?

The composition of the upper mantle is defined by ________.

What is chemical convection, and how does it affect the outer core?

The inner core has not always existed, but formed over time.Explain how conditions in the Earth changed over time to create an inner core.

What is the average density of oceanic crust?

Where is the highest rate of heat flow escaping the Earth's interior?

What is the average density of continental crust?

P waves cannot penetrate the outer core because it is liquid.

Explain how a P-wave shadow will form.Between which degrees will it form?

In the D" layer, the portion of the mantle closest to the core-mantle Boundary is hypothesized to be partially melted because the S-wave velocities decrease by 30% when passing through it.

The magnetic north pole is currently moving (toward /away from)the geographic North Pole, and the magnetic south pole is currently moving (toward /away from)the geographic South Pole.

Where is oceanic crust generated?

What materials make up Earth's core?

________ are responsible for the heat generated in the interior today.

Explain why S waves are unable to pass through the outer core.

Why might there be density changes between different parts of the same layer of the planet?

The mantle is composed of pure nickel and iron.

The inner core is shrinking.

An Introduction to Geology

Plate Tectonics: a Scientific Revolution Unfolds

Matter and Minerals

Magma, Igneous Rocks, and Intrusive Activity

Volcanoes and Volcanic Hazards

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes

Divergent Boundaries

Convergent Boundaries

Mass Wasting

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Global Climate Change

Earths Evolution Through Geologic Time

Energy and Mineral Resources

Touring Our Solar System

Filters