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Vocabulary
Structure of the Earth
Continental Drift Theory
Plate Tectonics
Miscellaneous
100
The thinnest layer of the Earth
What is the crust
100
There are ______________ main layers of the Earth.
What is four
100
Proposed the idea of Continental Drift Theory
Who is Alfred Wegener?
100
Earthquakes and Volcanoes are usually located close to ___________
What is a plate boundary?
100
Where most volcanoes are located
What is the ocean floor?
200
the theory that explains how the plates on Earth's surface move and change
What is plate tectonics?
200
The thickest layer of the Earth (where there is the most mass)
What is the mantle?
200
The theory of continental drift wasn't accepted because it did not explain __________
What is how the continents could be moved?
200
_____________ may form where plates move together.
What are volcanoes?
200
The Mid-Atlantic Ridge was formed due to
What is a spreading boundary?
300
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory?
300
Plates float on top of the _______________________.
What is the lower mantle?
300
Evidence of tropical plants were found on this continent where they couldn't grow today.
What is Antarctica?
300
The North American plate and the Eurasian Plate move away from each other about __________ each year.
What is 2 centimeters?
300
_________________ are a result from the build up of pressure at a fault that is suddenly released.
What are earthquakes?
400
Earthquake damage may be the greatest near the ________
What is the epicenter?
400
The part of the Earth including the crust and the upper (solid part) of the mantle.
What is the lithosphere?
400
______________ causes the plates to move.
What are convection currents?
400
_________ can occur at a fracture boundary where plates slide past each other
What are earthquakes?
400
Scientists listen for tremors using an instrument called a ______ to predict earthquakes.
What is a seismograph?
500
Although the hottest layer of the Earth, this layer is solid iron
What is the inner core?
500
An area of raised, flat land
What is a plateau?
500
Fossil evidence was discovered on two continents that seemed to fit together. Name them
What are South American and Africa?
500
The reason most major earthquakes in the US occur in California and Alaska?
What is they are on a plate boundary?
500
This scientist suggested that new crust forms at ocean ridges.
Who is Harry Hess?