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Vocabulary
Structure of the Earth
Continental Drift Theory
Plate Tectonics
Plate Boundaries
100

This is the name of the proposed "supercontinent" where all the earth's continents were once joined together.

What is the Pangaea?

100

it is the heaviest crust and sinks during subduction

what is oceanic-crust?

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

The theory that Earth's lithosphere, or outer shell, is made up of large plates that move

What is tectonic plates.

200

a horseshoe-shaped area around the Pacific Ocean that is the most seismically and volcanically active region on Earth

What is the Ring of Fire

200
Evidence of matching animal fossils from two separate continents _____________________ and _____________________
What is Africa and South America
200

The mid-ocean ridge is an example of a ____________________ boundary 

What is divergent boundary

200

This type of plate boundary involves two plates moving apart from one another.

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

___________________ occurs here where new ocean floor is formed.

what is seafloor spreading?
300

This type of plate boundary involves two plates moving toward each other.

What is a convergent boundary?

400
States that youngest rocks of ocean floor are at divergin boundaries, moving outward
What is seafloor spreading
400

One type of crust is oceanic crust. The other type is _______.

What is the continental crust?

400

This ocean is currently growing in size due to seafloor spreading.

What is the Atlantic Ocean?

400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
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 thinnest under the _____________________ and thickest 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

The two types of convergent boundaries

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

500

This is the term for the fracture created when one plate suddenly slides past another plate.

What is a fault?