Wegener
Under the Sea
Plate Tectonics
Boundaries
Miscellaneous
100

The name Wegener gave to the super-continent that existed 300 million years ago

What is Pangea?

100
The adding of new material to the ocean floor
What is Sea-Floor Spreading?
100
This constant motion causes the plates to move
What are Convection Currents?
100

When two plates collide

What is Convergent Boundaries?

100

This invisible force has reversed many times throughout history.

What is the magnetic field?

200
Term for an ancient organism that has been preserved in rock
What is a Fossil?
200
Long underwater mountain chains formed by divergent boundaries
What are Mid-Ocean Ridges?
200
Breaks in the Earth's crust
What are Faults?
200
When two plates separate
What is Divergent Boundaries?
200

These phenomena are related to plate tectonics.

What are earthquakes, volcanoes, and mountain building?

300
Wegener's hypothesis was rejected because he could not prove this
What is How the Plate Move?
300
During subduction, the ocean floor sinks back into the mantle creating these underwater
What are Deep Ocean Trenches?
300
Two continental plates colliding will create this
What are Mountains?
300
When two plates slide past each other
What is Transform Boundaries?
300

Wegener observed these two continents looked like puzzle pieces.

What are South America and Africa?

400
Term for the continents slow movement on Earth's surface
What is Continental Drift?
400
The 3 types of evidence for sea-floor spreading are ocean material, rock drilling, and this
What is Magnetic Stripes?
400
Transform boundaries usually cause these
What are Earthquakes?
400
Two continental plates separating will create this
What is a Rift Valley?
400

This undersea chain of mountains that formed as two pairs of tectonic plates spread apart

What is the Mid Atlantic Ridge?

500
The remains of a tropical plant in a cold area was proof of this type of evidence
What is Climate?
500

In the mid-1900s, scientists like Henry Hess mapped the ocean floor using this

What is Sonar?

500

The plates lie on top of a partially molten layer of rock called this. 

What is the asthenosphere?

500

In the mid-1960s, geologists combined all they knew about plates into a single theory called _____________

What is the Plate Tectonics Theory?

500

A convergent plate boundary—such as the one between the Indian Plate and the Eurasian Plate—forms this towering mountain range.  

What is the Himalayas?

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