Layers
Continental Drift
Plate Tectonics
Vocabulary
Vocabulary
100
This is the hard outer shell of the earth.
What is crust?
100
The idea that the continents were once joined together to form a large land mass.
What is continental drift?
100
The theory that the surface of the earth is made up of large plates that have moved over time.
What is plate tectonics?
100
An area formed when one plate descends beneath he other; earthquakes and volcanoes are common in this zone.
What is a subduction zone?
100
A crack in the earth's crust.
What is a fault?
200
Contains the upper mantle and crust.
What is the lithosphere?
200
The large landmass that use to contain all of the continents.
What is Pangea?
200
These are most likely to occur at a transform boundary.
What are earthquakes?
200
The sections of the earth's lithosphere, constantly moving in relation to the other sections.
What are plates?
200
A volcano that has not erupted for 10,000 years.
What is a dormant volcano?
300
A dense solid ball in the center of the earth composed of iron and nickel.
What is the inner core?
300
Old crust is destroyed and new crust is formed over time.
What is true?
300
New lithosphere is created at this type of boundary.
What is divergent?
300
A tool used to measure the intensity of an earthquake.
What is a seismograph?
300
The heat energy produced from the splitting of uranium atoms in a nuclear reactor.
What is nuclear energy?
400
A liquid that consists mainly of iron, some nickel and about 10% sulfur and oxygen.
What is the outer core?
400
The age of the earth.
What is 4.5 billion?
400
This type of boundary is most likely to form mountains.
What is convergent?
400
A scale used to rate the strength, or magnitude, of an earthquake at the point where the rock breaks.
What is the Richter Scale?
400
Type of volcano that is never expected to erupt again.
What is an extinct volcano?
500
The convection current in magma takes place here.
What is the asthenosphere?
500
The distance to the center of the earth.
What is 6,000km?
500
In convergent boundaries the ________________ dense lithosphere sinks.
What is more?
500
A fixed area of the mantle that is so hot the magma rises through the lithosphere.
What is a hot spot?
500
Molten rock below the surface of the earth.
What is magma?
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