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 is four
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
Volcanic eruptions can be two types.
What is gasses and less gassy or explosive or quiet or runny or sticky.
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
There is evidence of matching animal _____________ from two separate continents - Africa and South America.
What is fossils
200
These plate boundaries move apart from each other.
What is divergent boundary?
200
When volcanoes are about to erupt, they have alot of ________________ energy.
What is potential.
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 mantle?
300
Evidence of tropical plants were found on this continent
What is Antarctica
300
There are about ___________ major plates on earth.
What is 15-20 plates.
300
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
400
An area in the mantle which has high temperature and burns a hole in the crust forming seamounts and volcanic islands
What is a hot spot?
400
The area in the earth where convection currents form
What is the mantle
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 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
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!
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