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   Ch. 4
                      Earth’s Layers
What happens when the depth of
 Earth’s surface increases?

How do geologist observe Earth’s
 interior?

What is the order of Earth’s layers from
 the surface?
Describe Earth’s inner core.

What causes Earth’s magnetic field?
                      Heat Transfer
What are the three types of heat
 transfer?

Describe the three types.

What type of heat is in the mantle?
 What part of the mantle?
               Drifting Continents
What was Wegener’s hypothesis on
 continental drift?

What is Pangea? What is continental
 drift?

What three types of evidence did
 Wegener use to support his theory?
              Sea-Floor Spreading
What is the mid-ocean ridge?

How do scientist map out the bottom of
 the ocean?

Describe the process of sea-floor
 spreading.
What are the three types of evidence?

				
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