The layer of rock between the Earth's crust and core.
What is mantle
100
The boundary formed by the collision of two lithospheric plates.
What is convergent boundary
100
The solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle.
What is lithospere
100
A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle.
What is tectonic plate
100
The hypothesis that states that the continents once formed a single land mass, broke up, and drifted to their present locations.
What is continental drift
200
The thin and solid outermost layer of the Earth above the mantle.
What is crust
200
The boundary between two tectonic plates that are moving away from each other.
What is divergent boundary
200
The soft layer of the mantle on which the tectonic plates move.
What is asthenosphere
200
The theory that explains how large pieces of the Earth's outermost layer, called tectonic plates, move and change shape.
What is plate tectonics
200
The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.
What is sea-floor spreading
300
The central part of the Earth below the mantle.
What is core
300
The boundary between tectonic plates that are sliding past each other horizontally.
What is transform boundary
300
The strong, lower part of the mantle between the asthenosphere and the outer core; also the layer of the atmosphere between the stratosphere and the thermosphere and in which temperature decreases as altitude increases.
What is mesosphere
300
Stress that occurs when forces when forces act to squeeze an object.
What is compression
300
The bending of rock layers due to stress.
What is folding
400
An area of deep of deep cracks that forms between two tectonic plates that are pulling away from each other.
What is rift zone
400
The study of earthquakes.
What is seismology
400
A vent or fissure in the Earth's surface through which magma and gasses are expelled.
What is volcano
400
Stress that occurs when forces act to stretch an object.
What is tension
400
The body of molten rock that feeds a volcano.
What is magma chamber
500
The point on Earth's surface directly above an earthquake's starting point, or focus.
What is epicenter
500
A wave of energy that that travels through the Earth and away from an earthquake in all directions.
What is seismic wave
500
A wide, flat landform that results from repeated nonexplosive eruptions of lava that spread over a large area.
What is lava plateau
500
A break in a body of rock along which one block slides relative to another.
What is fault
500
A large, semicircular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink.