Volcanoes And Atmosphere Flashcards by Meg V

Q

Where are volcanoes most likely to form

A

Along plate boundaries

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Q

Vent where magma or gases expelled

A

Volcano

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Q

Non explosive eruption

A

Lava flows

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Q

Molten rock gathers in

A

Magma chamber

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Q

Lava runny has

A

Low silica content

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Q

Water content of magma is high

A

Explosive eruption

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Q

Viscosity of lava

A

How it flows

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Q

Lava like dripping wax

A

Pahoehoe

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Q

Cool stiff lava

A

Blocky

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Q

Little stones

A

Lapii

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Q

Pyro clastic material in atmosphere

A

Volcanic ash

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Q

Pyro clastic material forms

A

Magma explodes in air and hardens

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Q

Climate change by a volcanic eruption

A

Temps drop cause ash blocks sunlight

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Q

Types of volcanoes

A

Shield, composite, cindercone

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Q

Depression when roof of magma chamber collapses

A

Caldera

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Q

Rock begins to melt when

A

Temp increases and pressure decreases

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Q

Most active volcanos form

A

Where tectonic plates collide

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Q

Oceanic plate collides with a continental plate oceanic sub ducted cause

A

Oceanic is denser and thinner

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Q

Volcanoes of Hawaii are

A

Hot spots

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Q

Which volcano erupts in near future

Study These Flashcards

A

Active

Q

Tiltmeter

Study These Flashcards

A

Changes in volcano slope

Q

Small volcano that erupts for a short time

Study These Flashcards

A

Cinder cone

Q

Combination of non and explosive eruptions

Study These Flashcards

A

Compostite

Q

Flat area covered by water

Study These Flashcards

A

Lava platua

Funnel shaped pit

Crater

What is the atmosphere

Mixture of gases

The air we breathe is mostly

Nitrogen

How much of the atmosphere is oxygen

21%

Why is pressure greatest at surface

Gravity

Air temp changes as altitude increases cause of

Gases absorb solar energy

Protective ozone layer

Stratosphere

Most solar energy is

Absorbed by surface

Radiation is the transfer of energy through

Electromagnetic waves

Thermal conduction is

As heat through material

Convection

Circulation of liquid or gas

Global warming cause

Increase in greenhouse gases

Wind occurs because of diff in

Air pressure

Winds 30 latitude in both hemispheres to equator

Trade winds

Winds 30-60 in both hemispheres are

Polar easterlies

What causes local winds

Temp diffs

Primary pollutant

Sea salt

Largest source of human cause air pollution

Vehicle exhaust

Problem by ozone hole

UV rays reach the surface

Vehicle that runs on electricity and gasoline clue:Claus, TVD

Hybrid

Mid layer, coldest

Mesosphere

Layer where gases don't mix

Stratosphere

Highest layer

Thermosphere

Closest to the surface

Troposphere