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

A ________ boundary is when two plates are moving towards each other.

What is a convergent boundary?

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 _________ boundary is when two plates are moving away from each other.

What is a divergent boundary.

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 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

When crust bends, folds, and buckles at a convergent boundary.

What is orogeny

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

The four layers of the Earth.

What is the inner core, outer core, mantel, and crust.

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 person used sonar to map the bottom of the ocean and discovered the mid-ocean ridge in the Atlantic Ocean.
Who is Harry Hess!