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Weather
| Question | Answer |
|---|---|
| air mass | a huge body of air having roughly the same TEMPERATURE and HUMIDITY that covers a large area. There are four general types of air masses: HOT & DRY HOT & WET COLD & DRY COLD & WET |
| Areas near the equator are _________. Areas near the poles are _________. | warmer Areas near the equator get more direct sunlight. cold The poles get less direct sunlight, |
| All the air masses near the equator are __________. | hot |
| All the air masses near the poles are ______. | cold |
| Air masses that form over the water are ______. | Wet It picks up moisture from the body of water |
| When two air masses collide, the __________ changes | weather |
| What causes air masses to move? | prevailing winds |
| prevailing winds | winds that blow consistently in one direction over a certain region |
| weather front | the boundary between two air masses |
| cold front | a cold air mass moves into the area of a warm air mass - The warm air mass is forced up over the cold air mass. Clouds form, rain storm & the temperature drops - symbol: blue line w/ triangles that point in the direction the cold front is moving |
| warm front | a warm air mass overtakes a cold air mass; - The warm air rises over the cold air at a GENTLE angle. Clouds form bringing light rain and then warmner temps. -symbol: red line with semi-circles pointing in the direction the air mass is moving |
| stationary front | cold and warm air masses meet but neither pushes the other out of the way. Winds are light; a few days of clouds and fog |
| occluded front | air mass becomes separated from the ground A warm air mass is lifted by two cold air masses working together. The result is HEAVY rain |
| Interactions of air masses cause changes in _______ | weather |
| weather | daily conditions for a given location (day to day ) |
| climate | the average conditions over a long period of time |
| What is included in weather | air temp humidity atmospheric pressure |
| humidity | the amount of water vapor in the air |
| What type of weather does a high pressure system bring? | sunny day with little cloud cover or precipitation |
| What type of weather does a low pressure system bring? | cloud coverage and precipitation |
| watch | a general area could experience a storm (hurricane, tornado, etc) |
| warning | more severe than a "watch" hazardous weather is happening or about to happen in your area; take shelter |
| continental airm mass | air mass that forms over land. DRY |
| maritime air mass | air mass that forms over oceans. WET |
| polar air mass | air mass that forms over a cold region |
| tropical air mass | air mass that forms over a warm region |
| continental polar | cold and dry air mass |
| maritime polar | cold and moist air mass |
| continental tropical | warm and dry air mass |
| maritime tropical | warm and moist air mass |
| Why is it difficult to predict the weather? | Air masses are moved by WIND. Since winds can travel in different directions at different heights in the atmosphere, predicting the mvmt of air massess becomes complicated |
| isobar | line on a weather map that connects points of equal air pressure |
| High pressure | Dry air weighs MORE than moist air; The more air weighs, the higher the pressure; weather is generally dry and fair |
| low pressure | Moist air weighs LESS than dry air. The less air weighs, the lower the pressure; weather is gnerally cloudy or rainy |
Created by:
Ms. Vitale