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

The thinnest layer of the Earth

crust

100

There are ______________ main layers of the Earth.

four

100

Created the Continental Drift Theory

Alfred Wegener

100

Earthquakes and Volcanoes are usually located in relation to these

plate boundary

100

The Himalayan mountains are the result of a ___________________________ boundary.

convergent boundary

200

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

tectonic plates.

200

The thickest layer of the Earth

mantle.

200

What is one piece of evidence that plates have moved over millions of years?

Rock formations

Fossils 

200

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

divergent boundary

200

Hot air or liquid is less dense than cool air so hot liquids rise or fall?

Rise

300

The theory that all continents are fragments of Pangaea now drifting apart

Continental Drift Theory

300

Plates float on top of the _______________________.

Mantle

300

Which boundary type can cause earthquakes?

All Three

300

Name all three boundary types

Convergent

Divergent

Transform

300

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

earthquakes

400

States that youngest rocks of ocean floor are at divergin boundaries, moving outward

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

What is the name of the supercontinent 

Pangea
400

This is the mechanism (what causes) the plates to move

convection in mantle

400

The San Andreas Fault in California is an example of a ____________________ boundary. They slides past eachother

transform boundary

500

Although the hottest layer of the Earth, this layer is solid metal

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 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!