Vocabulary
Structure of the Earth
Continental Drift Theory
Plate Tectonics
Faults
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 at this location 

What is a plate boundary (Ring of Fire)

100

What type of stress occurs at a divergent boundary?

What is tension.

200
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
200
The thickest layer of the Earth
What is the mantle.
200

Evidence of matching animal fossils and land formation from two separate continents _____________________ and _____________________

(name of continents)

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 a divergent boundary; sea-floor spreading (mid-ocean ridges)

200

What occurs at a reverse fault?

Hanging wall slides up (forms mountains)

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

What Alfred Wegener used to support his theory of continental drift:

1.

2.

3.

1. Land formation

2. Fossils

3. Climate

300

The circular motion that drives plate tectonics is _______ and occurs in the _____________.

What is convection currents and the mantle (asthenosphere).

300

_________________ are a result from the build up of shearing 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

What 2 boundaries can cause a volcano?

What is divergent and convergent.

400

The San Andreas Fault in California is an example of a ____________________ boundary.

What is a transform boundary

500
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core
500

The Earth's ________ crust is the least dense and the __________ crust is the most dense.

What is continental and oceanic

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

What occurs at a convergent boundary?

What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)

500

These are the volcanoes that are no longer active, so we do not need to be cautious of them: __________

What is Extinct Volcanoes.

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