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Science > Earth Unit for sci > Flashcards

Earth Unit for sci Flashcards

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Biology 101 flashcards
1
Q

What are the layers of the earth called?

A

crust, mantle, outer core, inner core

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2
Q

What is the crust?

A

The crust is the outer layer, made of solid rock

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3
Q

What is the mantle made of?

A

Hot rock and lava

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4
Q

What is the outer core made of?

A

liquid metal, iron and nickel

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5
Q

What is the inner core?

A

solid metal, iron and nickel

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6
Q

What is the Theory of Continental Drift?

A

The separation of continents caused by plates drifting apart.

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7
Q

Who figured out Continental Drift?

A

Alfred Wegener

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8
Q

What are plates?

A

Plates are pieces of crust

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9
Q

What is Plate Tectonics?

A

Plate Tectonics is the movement of plates- Earth is like a broken egg shell with about 18 large pieces

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10
Q

What is Pangaea

A

Pangaea is the large supercontinent from 250 million years ago.

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11
Q

What is a trench?
(ocean floor spreading)

A

A trench is the deepest part of the ocean.

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12
Q

What are mid ocean ridges?
(ocean floor spreading)

A

underwater mountains

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13
Q

What is a rift valley?
(ocean floor spreading)

A

A crack where the new ocean floor forms

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14
Q

What is subduction?
(ocean floor spreading)

A

Subduction is when the old ocean floor is destroyed.

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15
Q

What does magma do during ocean floor spreading?

A

Magma comes out, cools and hardens and forms a new ocean floor

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16
Q

What is a Shield Volcano?

A

-only lava
-hardened lava
-no big explosions
-quiet

17
Q

What is a Cinder cone Volcano

A

-made mostly of cinders (golf ball sized volcanic rocks
- the cinders pile up
-Big EXPLOSIONS

18
Q

What’s a Stratovolcano?

A

-combination of lava and cinders
-mix of quiet lava flows and big explosions

19
Q

What is a Caldera?

A

A hole in the ground left by an exploded volcano

20
Q

What are the parts of a volcano?

A

vents, pipe, magma chamber

21
Q

What does it mean if a volcano is active?

A

An active volcano erupts continually or periodically

22
Q

What does it mean if a volcano is dormant?

A

A dormant volcano is “sleeping”. Erupted in history and is likely to erupt again.

23
Q

What does it mean if a volcano is extinct?

A

An extinct volcano erupted in historic times but is NOT likely to erupt again.

Science (6 decks)

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