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 ______________ main layers of the Earth.
What are four?
100
Created the Continental Drift Theory
Who is Alfred Wegener?
100
Earthquakes and volcanoes are usually located in relation to these places where tectonic plates meet.
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
Evidence of matching animal fossils from the two separate continents of _____________________ and _____________________.
What are Africa and South America?
200
The mid-ocean ridge is an example of a ____________________ boundary and sea floor spreading occurs here where new ocean floor is formed.
What is a divergent boundary?
200
Hot liquid is less ________________ than cool liquid.
What is dense?
300
The theory that all continents are fragments of Pangaea now drifting apart.
What is the theory of continental drift?
300
The two type of crust are _______________________.
What are continental and oceanic?
300
Evidence of tropical plants were found on this continent
What is Antarctica?
300
The three main plate boundaries.
What are divergent, convergent, and transform plate boundaries?
300
_________________ are a result from the build up of stress at a plate boundary.
What are earthquakes?
400
Theory which states that youngest rocks of the ocean floor are at divergent boundaries and are moving outward.
What is the theory of 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 super continent that occurred around 250 million years ago. Must be spelled correctly.
What is Pangaea?
400
This is the mechanism or process which causes the plates to move.
What are convection currents 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 made of 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 or why the continents moved?
500
The two types of convergent boundaries. One creates mountains and the other creates trenches or volcanoes.
What are continental collision (where mountains are usually formed) and subduction (where volcanoes or trenches often occur)?
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?
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