Plate Tectonics
Earthquakes
Mountains and Earth's Layers
Volcanoes
Continents
100
When the north pole becomes the south pole and the south pole becomes the north pole
What is Magnetic Reversal?
100
the block of rock moves up relative to the other block
What is a Reverse Fault?
100
a mountain that forms as continental crust crumples and bends into folds
What is Folded Mountain?
100
a dense cloud of superhot gases and rock fragments that races downhill
What is Pyroclastic Flow?
100
The continents were once joined together forming a huge supercontinent called
What is Pangaea?
200
this occurs when plates push together
What is Convergent Boundary?
200
the point on Earth's surface directly above the focus
What is Epicenter?
200
a ball of hot, solid metals
What is Inner Core?
200
rain that contains large amounts of acid
What is Acid Rain?
200
In 1912, Alfred Wegener proposed a hypothesis that the continents drifted apart
What is Continental Drift?
300
a gap where molten material rises to build new crust
What is Rift Valley?
300
an instrument that constantly records ground movements
What is Seismograph?
300
Earth's thickest layer
What is Mantle?
300
instead of water, it shoots out steam
What is Fumarole?
300
huge underwater mountain ranges
What is Mid-ocean Ridges?
400
occurs where plates scrape past each other
What is Transform Boundary?
400
a earthquake's magnitude is based on how fast the ground moves at a seismic station
What is Richter Scale?
400
mountains that form as blocks of rock move up or down along normal faults
What is Fault-block Mountain?
400
hot springs that form at spreading centers in the ocean
What is Deep-sea Vents?
400
a motion that transfers heat energy in a material
What is Convection Current?
500
occurs when ocean crust sinks under continental crust
What is Oceanic-continental Subduction?
500
a process in which shaking of the ground causes soil to act like a liquid
What is Liquefaction?
500
a layer of hotter, softer rock in the upper mantle
What is Asthenosphere?
500
magma that has reached Earth's surface
What is Lava?
500
The theory that Earth's lithosphere is made up of huge plates that move over the suface of the Earth
What is Theory of Plate Tectonics?
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