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

The occupation of Inge Lehmann, the Danish scientist who lived in the mid-1900s

Seismologist

100

The four layers of the earth in order of density (most dense to least dense)

What is the inner core, outer core, mantle, crust?

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

A vibration produced by an earthquake

What is a seismic wave?

300

The theory that all continents are fragments of Pangea 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

The type of boundary that forms new crust

What is divergent boundary?

300

The fastest type of seismic body wave produced by earthquakes 

What is P-waves?

400
States that youngest rocks of ocean floor are at divergin 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

The U.S. northwestern state where scientists found jellyfish fossils on top of a mountain

What is Utah?

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

A group of 452 volcanoes stretching around the Pacific Ocean

What is the Ring of Fire?

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

What is the point on Earth's surface directly above the focus, or origin, of an earthquake?

Epicenter