Chapter 2, Plate Tectonics: A Scientific Revolution Unfolds Video Solutions, Earth: An Introduction to Physical Geology

Problem 1

After referring to the section in Chapter 1 titled "The Nature of Scientific Inquiry," answer the following:
a. What observation led Alfred Wegener to develop his continental drift hypothesis?
b. Why was the continental drift hypothesis rejected by the majority of the scientific community?
c. Do you think Wegener followed the basic principles of scientific inquiry? Support your answer.

Brenda Sanchez

Numerade Educator

03:01

Problem 2

Referring to the accompanying diagrams that illustrate the three types of convergent plate boundaries, complete the following:
a. Identify each type of convergent boundary.
b. Volcanic island arcs develop on what type of crust?
c. Why are volcanoes largely absent where two continental blocks collide?
d. Describe two ways that oceanic-oceanic convergent boundaries are different from oceanic-continental boundaries? How are they similar?

Brenda Sanchez

Numerade Educator

05:02

Problem 3

Some predict that California will sink into the ocean. Is this idea consistent with the theory of plate tectonics? Explain.

Teresa Kelly

Numerade Educator

01:39

Problem 4

Refer to the accompanying hypothetical plate map to answer the following questions:
a. How many portions of plates are shown?
b. Are continents $A, B,$ and $C$ moving toward or away from each other? How did you determine your answer?
c. Explain why active volcanoes are more likely to be found on continents $A$ and $B$ than on continent $C$.
d. Provide at least one scenario in which volcanic activity might be triggered on continent

William Dunkerton

Numerade Educator

02:47

Problem 5

Volcanoes, such as the Hawaian chain, that form over mantle plumes are some of the largest shield volcanoes on Earth. However, several shield volcanoes on Mars are gigantic compared to those on Earth. What does this difference tell us about the role of plate motion in shaping the Martian surface?

Zachary Warner

Numerade Educator

05:02

Problem 6

Imagine that you are studying seafloor spreading along two different oceanic ridges. Using data from a magnetometer, you produced the two accompanying maps. From these maps, what can you determine about the relative rates of seafloor spreading along these two ridges? Explain.

Teresa Kelly

Numerade Educator

02:07

Problem 7

Australian marsupials (kangaroos, koala bears, etc.) have direct fos: links to marsupial opossums found in the Americas. Yet the moder marsupials in Australia are markedly different from their Americar relatives. How does the breakup of Pangaea help to explain these differences?

Joanna Quigley

Numerade Educator

03:48

Problem 8

Density is a key component in the behavior of Earth materials and is especially important in understanding key aspects of plate tectonics. Describe three different ways that density and/or density differences play a role in plate tectonics.

Devin Lea

Numerade Educator

03:29

Problem 9

Refer to the accompanying map and the city combinations given below to complete the following: (Boston, Denver), (London, Boston), (Honolulu, Beijing)
a. List the cities (in pairs) that are moving apart as a result of plate motion.
b. List the cities (in pairs) that are moving closer as a result of plate motion.
c. List the cities (in pairs) that are presently not moving relative to each other.

Carson Merrill

Numerade Educator