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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 ______________ layers of the Earth.
What is four
100
This German meteorologist developed the Continental Drift Theory
Who is Alfred Wegener
100
Earthquakes and Volcanoes are usually located near these
What are plate boundaries
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 are tectonic plates
200
The thickest layer of the Earth
What is the mantle.
200
The puzzle-like fit of these two continents is evidence of Pangaea
What is Africa and South America
200
The mid-ocean ridge is an example of a ____________________ boundary
What is divergent boundary
200
The area around the Pacific Ocean where 90% of the world's volcanoes are located
What is the Ring of Fire
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
These two features can form at divergent boundaries
What are mid-ocean ridges and rift valleys
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 divergent 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 in the mantle
400
The San Andreas Fault in California is an example of a ____________________ boundary.
What is transform
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 (mechanism)
500
Two common features at a convergent boundary
What are mountains, trenches, or volcanoes
500
This person used sonar to map the bottom of the ocean and discovered the mid-ocean ridge in the Atlantic Ocean.
Who is Hess