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Plate Theory

Unit on Plate Theory

QuestionAnswer
Divergent Boundary When two plates move away from each other.
Convergent Boundary When two plates collide with each other.
Transform Boundary When two plates move in the opposite direction.
Faults A break in a plate.
Epicenter The spot above ground where the earthquake occurred.
Focus The exact spot within a plate where earthquake occurred
Strike-slip Where a plate is broken because side to side motion
Normal Fault Where divergent boundaries cause a part or piece of plate to move downward
Reverse Faults Where convergent plate movement causes a piece of the plate movement upward
Composite/Strata Volcano Most explosive type of volcano. Is very cone shaped and has sticky lava (high viscosity).
Viscous How fast a liquid flows or moves.
Shield Volcano Least explosive type of volcano. Is shaped like a shield and has runny lava (low viscosity)
Cinder Cone Smallest type of volcano. They are the most common type of volcano. They erupt with a moderate amount of power.
Lava When magma (melted rock) reaches Earth's surface.
Magma Melted rock deep inside of Earth (usually under lithosphere).
Summit Crater The opening at the top of a volcano.
Tsunami A giant ocean wave that forms after a volcanic eruption, earthquake or landslide.
Subduction When oceanic crust is pushed under continental crust.
Central Vent Main opening in a volcano where the lava will flow out.
Weathering When rocks are broken down by mechanical or chemical means.
Mechanical weathering When ice, water, gravity, plants or animals break rocks
Chemical Weathering A process by which rocks break down by acids in water or other chemical means.
Acid precipitation When water mixes with air pollution creating a more acidic solution.
Igneous They are usually found in or near a volcano. -glassy -holes
Metamorphic A lot of pressure & heat make metamorphic rocks. Comes from the mantle. -Crystals -Bended or striped patterns
Sedimentary If a rock has layers it might be sedimentary. -Mud or Sand -Fossils (sometimes)
Created by: luisluna96
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