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20 Cards in this Set

  • Front
  • Back
Which gas makes up most of Earth's atmosphere?
nitrogen
In which layer of Earth's atmosphere does all weather take place?
troposphere
How does the jet stream affect winter weather in North America?
It carries cool weather from northern areas to southern areas.
If the relative humidity is 20 percent, what does this mean?
The air contains 20 percent of the water vapor it can hold.
What type of precipitation forms when rain falls through a layer of freezing air that freezes the rain?
sleet
What does the ozone layer absorb from the Sun?
harmful ultraviolet rays
What type of severe weather forms quickly from thunderstorms?
tornadoes
Be able to identify, in a drawing, the following clouds:
cirrus, stratus, nimbus, cumulus
Which tool do meterologists use to best predict local severe weather?
Doppler radar
If an air mass forms over a desert, what will the temperature and moisture be like?
hot and dry
On a mountain in the Western United States, which slope will be drier, the eastern or the western?
the eastern slope
Why do meteorologists use satellites to help them predict the weather?
The satellites gather information about weather conditions all over the world at the same time.
How can a volcanic eruption change the climate?
It can make the Earth cooler by blocking sunlight with ash and other materials.
When does hail form?
The wind tosses ice crystals up and down inside cumulonimbus clouds.
Why does cool air have greater air pressure than warm air?
The particles in cool air are closer together--packed more tightly--than warm air.
What causes people who live near bodies of water to have warmer and more even temperatures than people who live inland?
During the day, the air above the land gets warm and rises. It is replaced by cool air that blows in from the water. At night, the flow is reversed.
What happens when a mass of warm air runs into a mass of cooler air?
A warm front forms. The warm air is forced above the cooler air. This forms clouds. Then periods of steady rain or drizzle result.
What are the characteristics of a thunderstorm?
Small, intense storms with strong winds, heavy rain, thunder and lightning
What are the characteristics of a tornado?
Funnel shaped columns of air with extremely strong winds. They form quickly from thundertorms and are difficult to predict.
What are the characteristics of a hurricane?
Large spiraling storms that form over warm ocean waters. The winds are very fast. They begin as thunderstorms.