Y

The atmosphere extends up to an altitude of about:

200 miles

Oxygen makes up about ___ % of the atmosphere.

21

an electrically charged atom

Ion

layer of atmosphere containing ions; above the stratosphere

Ionosphere

As you climb through the lower stratosphere, the temperature:

Is constant

The earth's _____ retains the atmosphere from dissipating into space.

Gravity

The temperature of the mesosphere decreases with altitude because it is:

Heated from below by the ozone layer

region in the upper stratosphere where ozone is concentrated

Ozonosphere

What practical function is provided by the ionosphere?

Permits worldwide radio communication

The layer of the atmosphere just above the troposphere where the temperature remains fairly constant

Stratosphere

layer of the atmosphere just above the stratosphere

Mesosphere

The atmosphere layer in which most weather occurs is the

Troposphere

The layer of the atmosphere nearest the earth in which most weather changes occur

Troposphere

Which gas is a major factor in causing storms?

Water vapor

How does the ionosphere help radio transmission?

permits radio waves to travel around the earth's circumference

As you fly up through the troposphere into the stratosphere, what would you expect? temperature would stop decreasing temperature would remain constant encounter the ozone layer encounter turbulent air currents

temperature would stop decreasing temperature would remain constant

streamers or bands of light appearing in the sky at night, especially in polar regions

Aurora

As you climb through the mesosphere, the temperature:

Decreases

As you climb through the troposphere, the temperature:

Decreases

The atmospheric gases in the thermosphere are heated:

Directly by the sun

The ionosphere is classified by its:

Electrical properties

Ozone is formed from helium in the upper atmosphere.

False

The temperature of a spacecraft orbiting in the thermosphere or ionosphere would result from the effect of the extremely hot gases of the upper atmosphere.

False

As you climb through the thermosphere, the temperature:

Increases

As you climb through the upper stratosphere, the temperature

Increases

form of oxygen having three atoms of oxygen to a molecule

Ozone

Even though you are getting closer to the sun as you ascend into the troposphere, why does the temperature drop?

The lower atmosphere is heated by the ground

The layer of the atmosphere above the mesosphere where temperatures are the highest in the atmosphere

Thermosphere

The ozone layer acts as a protective shield from the effects of the sun's

Ultraviolet radiation