yes Flashcards

1
Q

plate tectonics

A

parts of the earths lithosphere that are in constant motion.

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2
Q

divergent boundary

A

plates divide

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3
Q

convergent boundary

A

plates collide

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4
Q

transform boundary

A

plates slide passed eachother

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5
Q

convection currents

A

this makes the plates move

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6
Q

pangea

A

a large landmass that began to break a part 200 million years ago.

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7
Q

Continental Drift

A

Alfred Wegener’s theory that continents slowly moved over Earth’s surface

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8
Q

Seafloor Spreading

A

Older oceanic crust is pushed away from the mid-ocean ridge as new rock is formed.

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9
Q

Mid-Ocean Ridges

A

An undersea mountain chain

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10
Q

Deep-Ocean Trenches

A

A deep valley along the ocean floor where oceanic crust slowly sinks toward the mantle.

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11
Q

Subduction

A

The process by which oceanic crust sinks beneath

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12
Q

rift vallys

A

A rift valley is a lowland region that forms where Earth’s tectonic plates move apart, or rift.

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13
Q

Folded Mountains

A

Folded mountains are created where two or more of Earth’s tectonic plates are pushed together.

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14
Q

Earthquakes

A

A sudden movement along a boundary of a tectonic plate.

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15
Q

Fault

A

A break or crack in Earth’s crust.

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16
Q

Volcanoes

A

An opening in the earth’s crust through which lava, volcanic ash, and gasses escape.

17
Q

Types of Volcanoes

A

Composite- Built by alternating layers of lava flows and ash flows, explosive eruptions
Shield- Thick flowing, slow moving lava, gentle eruptions
Cinder Cone
Lava Dome

18
Q

Volcanic Arc of Islands

A

When two oceanic crusts collide, the older, more dense crust will subduct. Hot, remelted material from the subducting slab rises and leaks into the crust, forming a chain of volcanoes/islands.

19
Q

Magma vs Lava

A

Magma- molten rock under the ground
Lava- molten rock above the ground

20
Q

Richter Scale

A

Scale that measures the amount of earthquake energy/magnitude.
1-10

21
Q

Tsunami

A

A series of waves caused by an earthquake or underwater volcanic eruption.

22
Q

Plate Movement

A

Driven by convection- can cause earthquakes, which can also cause tsunamis.

23
Q

Weathering

A