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Chapter 21
Study Guide 2013
| Question | Answer |
|---|---|
| What is weather? | state of the atmosphere at a specific time and place |
| What causes Earth's weather? | the sun |
| Air coming from over land is (moist/dry) and is called (Continental/Polar)? | dry, Continental |
| Air coming from over ocean (moist/dry) and is called (Continental/Polar)? | moist, Maritime |
| Air from the North is (cold/warm) and is called (Polar/Tropical)? | cold, Polar |
| Air from the South is (cold/warm) and is called (Polar/Tropical)? | warm, Tropical |
| What is a FRONT? | a boundary between two air masses of different density, moisture or temp |
| What is a COLD FRONT? | cold air advances toward warm air (blue, pointy on same side of line on a map) |
| What is a WARM FRONT? | lighter warm air advances over heavier colder air (red, rounded on same side of line on a map) |
| What is an OCCLUDED FRONT? | cold air moves toward cool air with warm air in between (purple, rounded and pointy on same side of line on a map) |
| What is a STATIONARY FRONT? | boundary between air masses that is not moving (blue, pointy on one side; red, rounded on other side of line on a map) |
| What kind of weather at Low Pressure areas? | cloudy because air rises when pressure is low and clouds form when air is lifted and cools |
| What kind of weather at High Pressure areas? | good weather because high pressure makes air sink making it difficult for air to rise, cool, condense and form clouds |
| What causes thunder? | lightning that superheats the air, causing it to expand quickly and clasp back together |
| How does a thunderstorm form? | warm, humid air rises rapidly within a cumulonimbus cloud |
| How is lightning created? | air moves inside storm clouds causing opposite charges |
| How is a hurricane classified? | by wind speed |
| In order to be called a hurricane the wind speed must be at least ____ mph. | 74 mph |
| Hurricanes need _____ and _____ from warm ocean water to gain strength. | heat and moisture |
| What is the name of a person who studies weather? | Meteorologist |
| What is the difference in an isoTHERM and an isoBAR? | ISOTHERM connects points of equal TEMPERATURE on a map; ISOBAR connects points of equal PRESSURE |
| The closer the isobars, the (faster/slower)the wind speed? | faster |
| Wind direction is determined by the direction the wind is (going/coming from). | coming from |
| What instrument measures wind direction? | wind vanes |
| What instrument measures wind speed? | anemometer |
| What instrument measures air pressure? | barometer |
| What instrument measures relative humidity? | sling psychrometer |
| Wind blows from (high/low) pressure to (high/low) pressure. | from high to low |
| Wind coming from the polar regions (poles) is called ____ and has ______ temperatures. | Polar, cold |
| Wind coming from the equitorial regions (equator) is called ____ and has ____ temperatures. | Tropical, warm |
| Air coming from over the ocean is (moist/dry) and is called ________. | moist, Maritime |
| Air coming from over land is (moist/dry) and is called _____. | dry, Continental |
| Air coming from the north over Canada is called _____? | Continental Polar |
| Air coming from south, moving over the ocean is called ______? | Maritime Tropical |
| What is on a map that shows the weather conditions at a specific location? | station model |
Created by:
ebegley
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