Show:
Vocabulary
Continental Drift Theory
Plate Tectonics
Miscellaneous
Boundary Type
100

A number of rigid, but moving, pieces of Earth's surface

What is tectonic plates.

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
Hot air or liquid is less ________________ than cool air or liquide
What is dense
100
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary
200
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
200

The name of the super continent that existed 250 mya

What is Pangaea 

200

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

What is divergent boundary (constructive)

200
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is thinnest under the ocean and thickest under the continents.
200

what happens at a continent to continent divergent boundary`

rift valley

300
States that youngest rocks of ocean floor are at divergin boundaries, moving outward
What is seafloor spreading
300

Evidence of glaciers were found on Africa and India this continent which proved it was once by_____

What is Antarctica

300
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
300
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
300

Where is one place where there are volcanoes

convergent ocean to continent and divergent ocean to ocean

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

2 of 4 reasons why continental drift theory came about

What is 1) continents fit together, 2) climate clues, 3)rock clues, 4) fossil clues

400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
400

Two pieces of evidence of seafloor spreading

What is magnetic reversal record in rocks and age of rocks

400

Where is there an ocean trench

ocean to continent convergent boundary

500
Plates float on top of the _______________________.
What is the asthenosphere
500

Continental Drift Theory was not accepted when initially proposed because it did not explain this

What is how the continents moved

500

The two types of convergent boundaries

What is ocean to continent or subduction (where volcanoes and island arc often occur) and continent to continent (where mountains are usually formed)

500

The 2 forces involved in plate tectonics

ridge push and slab pull

500

A subduction zone happens at

continental to oceanic convergent boundary