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EHMS 6th Science EQ

Test Review for PT, EQ and V

TermDefinition
magma The hot, molten rock below the earth’s surface is
focus point underground where an earthquake starts
plate tectonics the idea that Earth’s surface is broken into pieces that move.
shield volcano wide, gently sloped cone that forms from lava flows
seismograph an instrument that detects seismic waves
Magnitude the amount of energy released by an earthquake
crust the solid, rocky surface containing the continents and the ocean floor.
Tsunamis Giant ocean waves
Pangea name of the supercontinent that existed millions of years ago
Lava Hot, molten rock that reaches the earth’s surface
subduction plunging of one plate underneath another
mantle The second layer of Earth
primary waves from an earthquake arrive first
Volcano shape types cinder-cone shield composite
convergent boundary where Earth’s plates move together
triangulation method used for determining the location of an earthquake
secondary the second seismic waves to arrive at a faraway location
Richter magnitude scale based on the height of the lines on the seismogram used to describe the strength of an earthquake
Cinder Cone type of volcano has the steepest sides
Alfred Wegner developed the theory of continental drift
Henry Hess developed the theory of seafloor spreading
Created by: jenmcwarner
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