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Earth's Magnetic Field
Caused by the liquid outer core and makes the planet act like a giant bar magnet.
Vibrations that travel through Earth carrying the energy released during an earthquake.
The movement of a fluid, caused by different temperatures, that transfers heat from one part of the fluid to another.
Divergent Ocean/Ocean Boundary
Sea Floor Spreading occurs as oceanic plates move apart at the mid-ocean ridge.
Divergent Continental/Continental Boundary
A rift valley forms where two pieces of continental crust pull apart.
Convergent Ocean/Ocean Boundary
Where two plates of oceanic crust collide, one plate is subducted beneath the other.
Convergent Continental/Continental Boundary
Two continental plates collide, forming a mountain range.
The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
Deep Ocean Trench
A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
A series of mountains that have the same general shape and structure, formed where two continental plates collide.
Magnetic Field Reversal
When Earth's magnetic field is reversed, it can be seen as a pattern on the ocean floor at the mid ocean ridge.
Theory of Continental Drift
All the continents were once joined together in a single landmass and have since drifted apart.
Theory of Plate Tectonics
States that pieces of Earth's lithosphere are in slow, constant motion, driven by convection currents in the mantle.
Evidence for Continental Drift
Wegener Found that land features, fossils, and climate change were found is different continents now thousands of miles apart.
A scientist who came up with the hypothesis of Continental Drift, but his theory was rejected by the scientific community.
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