Vocabulary
Structure of the Earth
Plate Tectonics 1
Plate Tectonics 2
Miscellaneous
100
The thinnest layer of the Earth
What is the crust
100
There are ______________ main layers of the Earth.
What is four
100

What is something formed at a divergent boundary between two oceanic plates? 

What is underwater volcano or underwater mountain?

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
The thickest layer of the Earth
What is the mantle.
200

What is something formed at a convergent boundary between two continental plates? 

What are mountains? 

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

Hot air or liquid is less ________________ than cool air or liquide

What is dense

300

The part of the mantle that is a semi-solid. 

What is the asthenosphere? 

300

Plates float on top of the _______________________.

What is the asthenosphere

300

What is something formed at a convergent boundary between a continental and oceanic plate? 

What is subduction zone, trench, or volcanoes? 

300

What process creates the heat inside the Earth?

What is radioactive decay?
300
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
400

Type of earthquake wave that can only go though solids. 

What is S-Wave?

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
What is something formed at a divergent boundary between two continental plates?

What is a rift valley? 

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
Which type of crust, oceanic or continental, is the densest? 

What is oceanic

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

What could happen to the Afar region in the future? 

What is plates continue to pull apart and rift fills in with water?

500
The two types of convergent boundaries
What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)
500

Why don't we find sea floor older than 250 Million Years?

What is old sea floor is recycled during subduction? 

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