Explorations: An Introduction to Astronomy (Arny), 7th Edition

Chapter 6: The Earth

Questions for Review

1
Why is the Earth round? Is it perfectly spherical?
2
What are some of the most common elements composing the Earth's crust, mantle and core?
3
How do we know that the Earth has a liquid core? Why is the inner core solid even though it is hotter than the outer liquid core?
4
What are two explanations that scientists offer for why the interior of the Earth is hot? How hot is it?
5
How can scientists determine the age of the Earth?
6
What is convection? What are some other examples of convection besides hot soup?
7
What is the relation between rising and sinking material in the Earth's interior and subduction and rifting?
8
On what plate of the crust are you located? Which way is it taking you?
9
What is happening where one tectonic plate is smashing into another?
10
What factors are thought to be responsible for the Earth's magnetic field?
11
How is the aurora related to the Earth's magnetic field?
12
How does the fact that the Earth has a magnetic field help provide evidence for the theory of plate tectonics?
13
What were the main components of the atmosphere when the Earth formed, and what are the main components today? How and why did they change?
14
Explain how the greenhouse effect works and how it relates to global warming.
15
What is ozone? Why is it important?
16
What is the Coriolis effect? How does it affect life on Earth?
17
What is precession? What are some of its possible consequences?
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