Weather6
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- 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.