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

Evidence of matching continental edges like a torn apart newspaper are particularly obvious on what two 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 divergent boundary; sea-floor spreading
200
Hot air or liquid is less ________________ than cool air or liquide
What is dense
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 four of the major plates
What is any of the following North American plate, South American plate, Eurasian Plate, Indoaustralia plate, African plate, Antarctica plate
300

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

What is earthquakes

400

The name for a place where a dense oceanic plate is moving underneath another plate causing periodic earthquake and volcanic activities.

subduction zone

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 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 oceanic-continental subduction (where volcanoes often occur) and continental convergent (where mountains are usually formed)

500

At what plate boundary types is new oceanic crust being created?

divergent boundaries / mid ocean spreading zones