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

A

Active

Q

Tiltmeter

A

Changes in volcano slope

Q

Small volcano that erupts for a short time

A

Cinder cone

Q

Combination of non and explosive eruptions

A

Compostite

Q

Flat area covered by water

A

Lava platua

Q

Funnel shaped pit

A

Crater

Q

What is the atmosphere

A

Mixture of gases

Q

The air we breathe is mostly

A

Nitrogen

Q

How much of the atmosphere is oxygen

A

21%

Q

Why is pressure greatest at surface

A

Gravity

Q

Air temp changes as altitude increases cause of

A

Gases absorb solar energy

Q

Protective ozone layer

A

Stratosphere

Q

Most solar energy is

A

Absorbed by surface

Q

Radiation is the transfer of energy through

A

Electromagnetic waves

Q

Thermal conduction is

A

As heat through material

Q

Convection

A

Circulation of liquid or gas

Q

Global warming cause

A

Increase in greenhouse gases

Q

Wind occurs because of diff in

A

Air pressure

Q

Winds 30 latitude in both hemispheres to equator

A

Trade winds

Q

Winds 30-60 in both hemispheres are

A

Polar easterlies

Q

What causes local winds

A

Temp diffs

Q

Primary pollutant

A

Sea salt

Q

Largest source of human cause air pollution

A

Vehicle exhaust

Q

Problem by ozone hole

A

UV rays reach the surface

Q

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

A

Hybrid

Q

Mid layer, coldest

A

Mesosphere

Q

Layer where gases don’t mix

A

Stratosphere

Q

Highest layer

A

Thermosphere

Q

Closest to the surface

A

Troposphere