Earth Flashcards

1
Q

Divergent boundary

A

two plates move apart (spreading)
EX: mountain, volcano

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2
Q

Convergent boundary

A

Two plates move toward each other (collide)
EX: mountains, earthquakes

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3
Q

Transform boundary

A

Two plates slide against each other
EX: earthquake

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4
Q

Convergent + subduction

A

Ocean crust sinks below continental crust at a collision point

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5
Q

Tectonic plates-

A

large pieces of Earth’s crust that slowly moves along the atmosphere (Mantle)

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6
Q

Subduction-

A

Ocean plates go under the continental plate

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7
Q

Geologic process

A

natural events that shape the Earths surface
EX: plate tectonic movements

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8
Q

Geologic features

A

physical structures at the earth’s surface
EX: mountains and valleys

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9
Q

The flowing movement of the asthenosphere is mainly caused by

A

heat transferred from the core

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10
Q

The boundary where two continental plates collide is called

A

convergent

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11
Q

A large chain of mountain ranges and volcanoes surrounding the Pacific Ocean

A

Ring of Fire

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12
Q

Two plates sliding past each other will form…

A

Transform boundaries

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13
Q

This theory describes HOW plates are able to move.

A

Plate tectonics

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14
Q

The North American and European plate are divided by this.

A

Mid Atlantic Ridge

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15
Q

The major force that drives plate tectonics?

A

Mantle Convection

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16
Q

Formed when an OCEAN plate subducts beneath another OCEAN plate…

A

Volcanic Island Arc

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17
Q

Is the rock younger or older as you get closer to the mid ocean ridge?

A

younger

18
Q

The inner core is made of….

A

Nickel and iron

19
Q

This layer of rock that surrounds Earth’s surface is called

A

the lithosphere

20
Q

A huge undersea earthquake off the coast Japan could produce a

A

tsunami

21
Q

Hots spots are formed where

A

magma from the mantle burns through the crust.

22
Q

As you travel to island further away from a hotspot

A

the island gets older

23
Q

The thin layer of rock on Earth’s surface is the _________.

A

lithosphere

24
Q

The oceanic crust is ______ dense than the continental crust.

A

more

25
Q

The _____ is made up of LIQUID iron and nickel.

A

outer core

26
Q

The _____ is made up of SOLID iron and nickel.

A

inner core

27
Q

Which Earth layer is most dense?

A

Inner core

28
Q

Earth’s lithosphere is broken up into piece called

A

tectonic plates

29
Q

These pieces move around the surface of Earth due to the ____________ ____________ in the asthenosphere.

A

convection currents

30
Q

The flowing movement of the asthenosphere is mainly caused by _______ __________.

A

density differences

31
Q

These currents flow because the material is heated from the ______.

A

core

32
Q

Heated material rises because it is _____ dense.

A

less

33
Q

Cooler material sinks because it is _____ dense.

A

more

34
Q

Pangeae

This is known as the ___________ ___________ theory.

A

continental drift

35
Q

Although Alfred Wegener did not know this at the time, the force that caused the continents to change positions over the last 65 million years was __________ __________.

A

plate tectonics

36
Q

The San Andreas Fault is associated with which type of plate boundary?

A

transform

37
Q

One geologic feature that frequently occurs when lithosphere plates collide (convergent)

A

mountain

38
Q

One geologic feature that frequently occurs when lithosphere plates move apart from each other (diverge).

A

rift, mid ocean ridges

39
Q

One geologic feature that frequently occurs when lithosphere plates slide against each other (transform).

A

earthquakes

40
Q

Lithosphere-

A

Ball of rock.
Thinnest layer of rock on Earth’s surface

41
Q

Asthenosphere-

A

soft, flowing layer of rock under the Earth’s crust that helps the tectonic plates move.