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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
Created the Continental Drift Theory
Who is Alfred Wegener
100
Earthquakes and Volcanoes are usually located in relation to these
What is a plate boundary
100
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary
200
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
200

This is where convection currents take place

What is the mantle.

200

Evidence of matching mountains from two separate continents _____________________ and _____________________

What is Africa and South America

200
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading
200

This type of plate boundary does not create or destroy crust 

What is transform 

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 asthenosphere
300
Evidence of tropical plants were found on this continent
What is Antarctica
300

Name the two types of plates (crust)

What are continental and oceanic

300

_________________ are a result from the build up of friction/stress at a plate boundary.

What is earthquakes

400

States that youngest rocks of ocean floor are at divergent boundaries, moving outward

What is seafloor spreading

400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
400
Pangaea existed this many millions of years ago
What is around 250 million years ago
400

This is the mechanism (what causes) the plates to move

What is convection currents in the mantle

400
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
500

Crust is destroyed at this type of boundary 

What is convergent 

500

The Earth's crust is denser under the _____________________ and less dense under the _____________________.

What is thinnest under the ocean and thickest under the continents.

500
Continental Drift Theory was not accepted because it did not explain this
What is how the continents moved
500

Occurs at a convergent boundary (Name 2 things)

What is subduction (where volcanoes often occur) and collision/2 plates collide (where mountains are usually formed)

500

New crust is formed at this type of boundary.

What is divergent