The Earth's Atmosphere Flashcards

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1
Q

Temperature

A

The degree of hotness or coldness of a body or environment.
A measure of the average kinetic energy of the particles in a sample of matter, expressed in terms of units or degrees designated on a standard scale.

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2
Q

Altitude

A

The height of an object or point in relation to sea level or ground level.

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3
Q

How do we describe Earth’s Atmosphere?

A
  • Earth’s Gaseous Envelope
  • The earth is completely surrounded by “a sea of air” known as the atmosphere. Air is in fact a mixture of many gases.
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4
Q

Atmosphere

A

Atmosphere is a layer of gases around Earth. We usually call it air. It is 78% Nitrogen, 21% Oxygen, And 1% of trace gases including Argon and Carbon Dioxide

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5
Q

Layers of the Atmosphere

A

Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

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6
Q

Troposphere

A

The troposphere is the lowest layer of Earth’s atmosphere. We live in the troposphere. Weather happens in this layer. Most clouds are found in the troposphere.

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7
Q

Stratosphere

A

The stratosphere is the second layer (going upward) of Earth’s atmosphere. The ozone layer is within the stratosphere.

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8
Q

Mesosphere

A

This is the coldest layer.
Protects Earth from meteor,

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9
Q

Thermosphere

A

Hottest layer of the earth’s atmosphere. Also, the Aurora Borealis (northern lights) occurs in this layer.

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10
Q

Exosphere

A

The atmosphere is extremely thin here. The upper part of this layer is the beginning of true space.
Some manmade satellites orbit the Earth within this layer.

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