Weather Study Guide Part 2 What is a stationary front?

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Weather Study Guide - Part 2

  1. What is a stationary front?

 when a warm air mass and a cold air mass meet and stop moving; lots of rain!
2.  What happens when two air masses with large differences in air pressure meet?

It creates wind.
3.  What is an occluded front?

A warm air mass gets trapped between two cooler air masses.
4. How are winds named?

They are named by the direction that they come from.
5.  What two things do all air masses have in common?

temperature and humidity (moisture)
6.  What is the weather like after a cold front passes through?

The weather is colder and drier.
7.  What kind of weather would you expect if you saw cumulonimbus clouds in the sky?

thunderstorms - rain, lightning, hail, wind, thunder, possible tornadoes
8.  What do meteorologists depend on to forecast an approaching storm?

air pressures drops
9.  What is climate?

the average temperature or weather conditions over  a long period of time; the lasting weather changes in an area
10.  What do hurricanes need to become larger and more powerful?

warm water
11.  What determines where a thunderstorm is coming from and where it will go?

wind direction

12.  Describe a warm front.

a warm air mass moves up and over a cold air mass producing clouds and light rain
13.  What global winds are responsible for the weather in North Carolina?

Prevailing Westerlies
14.  If a tropical storm forms off the coast of West Africa, what effect will it have on weather in NC?

It increases the possibility of a hurricane.
15.  What does an H and L on a weather map stand for?

H - High air pressure   L - low air pressure
16.  What is the jet stream?

a fast moving stream of air high in the atmosphere that separates cold and warm air masses; blows from west to east
17.  What is the gulf stream?  How does it affect climate?

The gulf stream is a fast moving current of warm water in the Atlantic Ocean that keeps the temperatures along the coast more mild.
18.  What is El Nino?  What is La Nina?  How do they affect climate?

El Nino – an unusual warming of water in the Pacific Ocean

La Nina – an unusual cooling of water in the Pacific Ocean.

Both can cause more drastic weather conditions – more severe hurricanes, flooding in one area and drought in another, etc…

19.  What is the difference between weather and climate?

weather - changes constantly

climate - changes slowly (over a long period of time)
20.  Explain the greenhouse effect?

Too much carbon dioxide in the atmosphere causes the atmosphere to hold in too much heat (like a greenhouse)

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