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Ch8 Weather Patterns
Weather Patterns
| Question | Answer |
|---|---|
| What 2 gasses is the atmosphere made of? | Nitrogen and oxygen |
| As you go up through the atmosphere what happens to the air pressure? Why? | The air pressure decreases because gas particles get farther apart |
| In what layer of the atmosphere will you find weather conditions? | Troposphere |
| Why does the air above land and water have different temperatures? | land and water heat and cool at a different rate |
| Define: Convection current | gases or liquids rise and slide in a circular path |
| Winds generally blow in which direction across the United States? | West to East |
| How do convection currents relate to the water cycle? | Convection currents and water cycle relate because they both have condensation and precipitation. |
| Define: Air Mass | large body of air with similar properties through it |
| Define: Front | a boundary |
| What kind of air causes precipitation at fronts? | cold air |
| Explain what happens during a cold front | Cold air forces warm air to rise quickly. The rising air forms clouds. Clouds make precipitation |
| Explain what happens during a warm front | warm air out of the area moves against cooler air. The warm air gradually rises above the cooler air. The clouds move slowly and cause longer periods of precipitation. |
| Explain what happens at a stationary front | A front that does not move very much and it moves back and forth over the same area |
| Name 4 types of severe weather | thunderstorms, tornadoes, hurricanes, and blizzards |
| How does a thunderstorm form? | 1. All currents rise up 2. Currents are moving both up and down 3. All currents move down precipitation |
| How does a hurricane form? | When air rolls between 2 layers of wind moving in different directions |
| How does a tornado form? | Air rolls between two layers of winds The rolling air is turned so it stands upright and becomes a tornado |
| What should you do to be prepared for severe weather? What items would be important to have? | Board up your windows, store food and water, have flashlights and battery powered radios available, stay inside |
| Define: Barometer | air pressure |
| Define: Anemometer | wind speed |
| Define: Rain gauge | rain fall |
| In what direction across the United States do weather fronts usually move? | West to East |
| High Air Pressure (symbol for) | H |
| Low Air Pressure (symbol for) | L |
| Cold Front (symbol for) | spikes down |
| Stationary Front (symbol for) | spikes up and humps down |
| Sunny (symbol for) | Sun |
| Cloudy (symbol for) | Cloud |
| Thunderstorms (symbol for) | Cloud with lightening |
| Define: Climate | average of weather conditions over a long period of time |
| Compare and contrast weather and climate | Weather is day to day. Climate is weather for a long time. Weather and climate are similar because it is both weather conditions, different because of the length of time. Climates do not change as much as daily temperature does. |
| What are 2 things that can affect climate? | Oceans and land forms |
| How are climates determined? | Climates are determined by many years of weather |
| Name 3 events that can change an areas climate | The sun's energy, volcanic eruptions, and asteroid or meteorite impacts |
Created by:
blazegreen
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