A towering cloud, or cluster of clouds, accompanied by thunder, lightning, and a strong, gusty wind is a:
As a radiosonde balloon ascends through the atmosphere,
the balloon eventually bursts and the radiosonde returns to earth.
At night, when the weather is extremely cold and dry,
atmospheric pressure decreases with increasing height.
At the 500 mb level, the amount of oxygen inhaled in a single breath is ________ of that inhaled at sea level.
If you were to take a breath of pure oxygen, from a tank, you'd be getting about ________ the amount of oxygen you'd get by taking a normal breath of our atmosphere.
In a volume of air near the earth's surface, ______ occupies 78 percent and ______ nearly 21 percent.
In the atmosphere, tiny solid or liquid suspended particles of various compositions are called:
In the middle latitudes of the Northern Hemisphere, surface winds tend to blow ______ and ______ around an area of low surface pressure.
In the middle latitudes of the Northern Hemisphere, surface winds ten to blow ______ and ______ around an area of high pressure.
Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly:
50 percent of the earth's atmosphere.
On a weather map, sharp changes in temperature, humidity, and wind direction are marked by a:
Ozone in the stratosphere:
absorbs ultraviolet radiation and in turn warms the stratosphere causing a temperature inversion.
The difference in altitude (i.e. the thickness) is greatest in the layer bounded by:
The gas that shows the most variation from place to place and from time to time in the lower atmosphere is which of the following?
The greenhouse gas that has been increasing in concentration, at least partly due to deforestation, is:
carbon dioxide (CO2).
The instrument that measures temperature, pressure, and humidity at various altitudes in the atmosphere is the:
The ionosphere is an atmospheric layer that contains a high concentration of ions. An ion is:
an atom that has lost one or more electrons.
The only substance near the earth's surface that is found naturally in the atmosphere as a solid, liquid, and a gas is:
The primary source of oxygen for the earth's atmosphere during the past half billion years or so appears to be:
There is a lot of mixing and overturning of air in which of the following atmospheric layers?
Typically, water vapor occupies about what percentage of the air's volume near the earth's surface?
Less than 4 percent.
Where cold surface air replaces warm air, the boundary separating the different bodies of air is:
a cold front.
Which of the following weather elements ALWAYS decreases as we climb upward in the atmosphere?