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

The area on the surface directly above the focus of an earthquake.

What is the epicenter?

100

This is the only completely liquid layer of the Earth.

What is the outer core

100

Scientist who created the Continental Drift Theory

Who is Alfred Wegener?

100

Earthquakes and volcanoes are usually located near plate _______________.

What are plate boundaries?

100

The Himalayan mountains are the result of a ___________________ boundary.

What is convergent boundary?

200

Rigid, but moving, pieces of Earth's crust (two words)

What are tectonic plates?

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

The two continents with matching fossils that Wegener used in his theory.

What are South America and Africa?

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

The thinnest layer of the Earth

What is the crust?

300

Evidence of tropical plants found on this continent supports continental drift

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

These natural hazards result from the build up of stress at a plate boundary.

What are earthquakes?

400

The creation of new ocean floor at divergent plate boundaries (the process, not the place).

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

Describes areas that do not match the other rocks and fossils, and likely came from somewhere else.

What is suspect?

400

The mechanism in the mantle that causes the plates to move

What are convection currents?

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

Name the three types of plate boundaries.

What are convergent, divergent, and transform?

500

Harry Hess used this sound reflection to map the bottom of the ocean floor.

What is sonar?

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