WK3: Assignment: Chapters 10 and 4
Due: 11:59pm on Sunday, March 26, 2023
To understand how points are awarded, read the Grading Policy for this assignment.
Chapter 4 Reading Quiz Question 1
Part A
Which of the following statements is part of the continental drift hypothesis? Choose all that apply.
Hint 1.
Researchers came to realize that Earth's continents are not static; instead, they gradually migrate across the globe.
ANSWER:
Convective flow in the mantle is the underlying driving force of continental drift.
A chain of volcanoes known as "hot spot tracks" can determine the direction of continental drift.
A single supercontinent consisting of all Earth's landmasses once existed.
Deep-sea drilling indicates that sediments increase in age with increasing distance from spreading ridges.
The continents of South America and Africa fit together like pieces of a jigsaw puzzle.
Correct
Chapter 4 Question 4 Word Analysis
Part A
The change from thinking the continents are stationary to understanding that the outer layer of the earth moves slowly nearly all of the time
occurred primarily because ________.
ANSWER:
we had two world wars and learned a lot from them about the oceans that explained how continents moved
we got space travel and could see the motions
we began to make global observations that required recognition that the continents and oceans had not always been in their
current positions
we improved our surveying instruments significantly
Correct
, Chapter 4 Question 59 Word Analysis
Part A
Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that doe
not fit the pattern.
ANSWER:
fossil evidence
ancient climates
fit of the continents
paleomagnetism
Correct
Chapter 4 Question 4.2.5 Concept Check
Part A
What are two aspects of Wegener's continental drift hypothesis that most U.S. Earth scientists found objectionable? Choose all that apply.
Hint 1. Observations That Were Already Established
Wegener had already observed that continents could somewhat fit together like pieces of a puzzle. Did Wegener try to explain why this
puzzle was no longer assembled?
ANSWER:
Wegener said that past glaciation patterns and locations of past swamps indicated that many of the continents used to be
assembled together toward the southern portion of Earth.
Wegener said that continental drift was responsible for fossils such as Glossopteris and Mesosaurus being found on continents
that are separate from each other today.
Wegener said that the continents plowed through the thin ocean floor as they changed positions.
Wegener said that the continents were moved by the gravitational forces of the Moon and Sun.
Wegener said that the continents were moved because of convection within Earth's mantle.
Correct
, Chapter 4 Question 6 Word Analysis
Part A
Wegener thought that ________.
ANSWER:
there was once one big continent that was later separated by the Atlantic Ocean
there were once several continents that recombined to form the continents we have today
there were once two big continents that were separated later by the Atlantic Ocean
there was once one big continent that later broke into several pieces
Correct
Chapter 4 Question 4.2.1 Concept Check
Part A
What evidence first indicated to scientists that the continents were once connected?
Hint 1. [[The Idea that Started the Inquiry]]
In 1915, Wegener made an initial observation that made him ask if the continents may have been in different locations in the past.
What was this observation?
ANSWER:
The distribution of coal from tropical swamps of the past among North America, Europe, northern Africa, and Asia
The presence of Glossopteris on fossils on five different continents
The apparent jigsaw-like fit of continents together, as in the case of South America and Africa
Deformed igneous rocks in Brazil that highly resembled similar rocks in Africa
The evidence of past isthmian links that allowed land animals to reach other landmasses across the ocean
Correct
Chapter 4 Question 13 Word Analysis
,Part A
Which of the following major discoveries was not made near or after World War II?
ANSWER:
deep focus earthquakes that occur in some regions of the earth
the apparent "fit" of the coastlines of Africa and South Africa
the extensive ranges of mountain chains on the sea floor
the absence of rocks older than 200 million years on the sea floor
Correct
Chapter 4 Question 14 Word Analysis
Part A
Plate tectonic boundaries were first identified by ________.
ANSWER:
mapping continental margins
mapping the mountain chains
mapping earthquakes and volcanoes
mapping subduction zone
All attempts used; correct answer displayed
Chapter 4 Question 4.3.4 Concept Check
Part A
At which plate boundaries do lithospheric plates (a) move toward each other, (b) move past each other, and (c) move away from each othe
Hint 1. Boundary Types as Indicators of Movement Direction
To remember which directions that two plates take at the three boundary types, look at the prefixes of the three words: con-, di-, and
trans-.
ANSWER:
Due: 11:59pm on Sunday, March 26, 2023
To understand how points are awarded, read the Grading Policy for this assignment.
Chapter 4 Reading Quiz Question 1
Part A
Which of the following statements is part of the continental drift hypothesis? Choose all that apply.
Hint 1.
Researchers came to realize that Earth's continents are not static; instead, they gradually migrate across the globe.
ANSWER:
Convective flow in the mantle is the underlying driving force of continental drift.
A chain of volcanoes known as "hot spot tracks" can determine the direction of continental drift.
A single supercontinent consisting of all Earth's landmasses once existed.
Deep-sea drilling indicates that sediments increase in age with increasing distance from spreading ridges.
The continents of South America and Africa fit together like pieces of a jigsaw puzzle.
Correct
Chapter 4 Question 4 Word Analysis
Part A
The change from thinking the continents are stationary to understanding that the outer layer of the earth moves slowly nearly all of the time
occurred primarily because ________.
ANSWER:
we had two world wars and learned a lot from them about the oceans that explained how continents moved
we got space travel and could see the motions
we began to make global observations that required recognition that the continents and oceans had not always been in their
current positions
we improved our surveying instruments significantly
Correct
, Chapter 4 Question 59 Word Analysis
Part A
Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that doe
not fit the pattern.
ANSWER:
fossil evidence
ancient climates
fit of the continents
paleomagnetism
Correct
Chapter 4 Question 4.2.5 Concept Check
Part A
What are two aspects of Wegener's continental drift hypothesis that most U.S. Earth scientists found objectionable? Choose all that apply.
Hint 1. Observations That Were Already Established
Wegener had already observed that continents could somewhat fit together like pieces of a puzzle. Did Wegener try to explain why this
puzzle was no longer assembled?
ANSWER:
Wegener said that past glaciation patterns and locations of past swamps indicated that many of the continents used to be
assembled together toward the southern portion of Earth.
Wegener said that continental drift was responsible for fossils such as Glossopteris and Mesosaurus being found on continents
that are separate from each other today.
Wegener said that the continents plowed through the thin ocean floor as they changed positions.
Wegener said that the continents were moved by the gravitational forces of the Moon and Sun.
Wegener said that the continents were moved because of convection within Earth's mantle.
Correct
, Chapter 4 Question 6 Word Analysis
Part A
Wegener thought that ________.
ANSWER:
there was once one big continent that was later separated by the Atlantic Ocean
there were once several continents that recombined to form the continents we have today
there were once two big continents that were separated later by the Atlantic Ocean
there was once one big continent that later broke into several pieces
Correct
Chapter 4 Question 4.2.1 Concept Check
Part A
What evidence first indicated to scientists that the continents were once connected?
Hint 1. [[The Idea that Started the Inquiry]]
In 1915, Wegener made an initial observation that made him ask if the continents may have been in different locations in the past.
What was this observation?
ANSWER:
The distribution of coal from tropical swamps of the past among North America, Europe, northern Africa, and Asia
The presence of Glossopteris on fossils on five different continents
The apparent jigsaw-like fit of continents together, as in the case of South America and Africa
Deformed igneous rocks in Brazil that highly resembled similar rocks in Africa
The evidence of past isthmian links that allowed land animals to reach other landmasses across the ocean
Correct
Chapter 4 Question 13 Word Analysis
,Part A
Which of the following major discoveries was not made near or after World War II?
ANSWER:
deep focus earthquakes that occur in some regions of the earth
the apparent "fit" of the coastlines of Africa and South Africa
the extensive ranges of mountain chains on the sea floor
the absence of rocks older than 200 million years on the sea floor
Correct
Chapter 4 Question 14 Word Analysis
Part A
Plate tectonic boundaries were first identified by ________.
ANSWER:
mapping continental margins
mapping the mountain chains
mapping earthquakes and volcanoes
mapping subduction zone
All attempts used; correct answer displayed
Chapter 4 Question 4.3.4 Concept Check
Part A
At which plate boundaries do lithospheric plates (a) move toward each other, (b) move past each other, and (c) move away from each othe
Hint 1. Boundary Types as Indicators of Movement Direction
To remember which directions that two plates take at the three boundary types, look at the prefixes of the three words: con-, di-, and
trans-.
ANSWER:
