Earth Flashcards

(41 cards)

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?

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

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 _________.

24
Q

The oceanic crust is ______ dense than the continental crust.

25
The _____ is made up of LIQUID iron and nickel.
outer core
26
The _____ is made up of SOLID iron and nickel.
inner core
27
Which Earth layer is most dense?
Inner core
28
Earth's lithosphere is broken up into piece called
tectonic plates
29
These pieces move around the surface of Earth due to the ____________ ____________ in the asthenosphere.
convection currents
30
The flowing movement of the asthenosphere is mainly caused by _______ __________.
density differences
31
These currents flow because the material is heated from the ______.
core
32
Heated material rises because it is _____ dense.
less
33
Cooler material sinks because it is _____ dense.
more
34
# Pangeae This is known as the ___________ ___________ theory.
continental drift
35
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 __________ __________.
plate tectonics
36
The San Andreas Fault is associated with which type of plate boundary?
transform
37
One geologic feature that frequently occurs when lithosphere plates collide (convergent)
mountain
38
One geologic feature that frequently occurs when lithosphere plates move apart from each other (diverge).
rift, mid ocean ridges
39
One geologic feature that frequently occurs when lithosphere plates slide against each other (transform).
earthquakes
40
Lithosphere-
Ball of rock. Thinnest layer of rock on Earth's surface
41
Asthenosphere-
soft, flowing layer of rock under the Earth's crust that helps the tectonic plates move.