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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 animal fossils from two separate continents _____________________ and _____________________
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 liquid.

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 are earthquakes

400

States that youngest rocks of ocean floor are at diverging 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
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

This happens at a Convergent boundary to form volcanoes or ocean islands. 

What is subduction

500

This person used sonar to map the bottom of the ocean and discovered the mid-ocean ridge in the Atlantic Ocean.

Who is Harry Hess!