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Understanding Weather

Understanding Weather. By: Chastity Reynolds. Weather. Weather is the condition of the atmosphere at a particular time and place. Water Cycle : Continuous movement of water from water sources from water sources into the air, onto and over land, into the ground, and back to water sources.

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Understanding Weather

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  1. Understanding Weather By: Chastity Reynolds

  2. Weather • Weather is the condition of the atmosphere at a particular time and place. • Water Cycle: Continuous movement of water from water sources from water sources into the air, onto and over land, into the ground, and back to water sources.

  3. Humidity Humidity: is the amount of water vapor moisture in the air. Relative Humidity: is the amount of moisture the air contains compared with the maximum amount it can hold at a particular temperature

  4. Process of Condensation Condensation: the process by which a gas, such as water vapor, becomes a liquid. Dew Point: the temperature to which air must coo to be completely saturated.

  5. Clouds Cloud: a collection of millions of tiny water droplets or ice crystals. • Cumulus Clouds- puffy, white clouds • Stratus Clouds-form in layers • Cirrus Cloud- thin, feathery, white clouds

  6. Precipitation Precipitation: water, in solid or liquidform, that falls from the air to the Earth. • Examples: Snow, Sleet, or hail • You measure precipitation using a rain gauge. It measures the amount of rainfall

  7. Air Mass Air Mass: large body of air that has similar temperature and moisture throughout. • Cold Air Masses-Brings extremely cold weather to the U.S. • Warm Air Masses-Brings hot and humid weather in the summer

  8. Fronts Fronts: boundary that forms between two different air masses Cold Front-cold air mass meets with warm air mass. Cold air overrides the warm air. Moves fast producing thunderstorms. Warm Front-warm air mass meets with cold air mass. Warm air moves over cold air. It brings drizzly precipitation.

  9. Severe Weather Thunderstorms: are small, intense weather systems that produce strong heavy winds, heavy rain, lightning, and thunder. • Thunderstorms are produced when the air near the Earth's surface must is warm and the atmosphere is unstable.

  10. Severe Weather Lightning: a large electrical discharge that occurs between two oppositely charged surfaces Thunder: sound that results from the rapid expansion of air along the lightning strike.

  11. Severe Weather Tornado:small, rotating column of air that has high wind speeds and low central pressure and that touches the ground. Hurricane:large,rotating tropical weather system with wind speeds of at least 119 km/h.

  12. Forecasting Weather • A thermometer is a tool used to measure air temperature. • A barometer is an instrument used to measure air pressure.

  13. Forecasting Weather • Wind direction can be measured using a windsock or wind vane. • Wind speed is measured by a device called an anemometer

  14. Forecasting Weather • Isobars are lines that connect points of equal air pressure.

  15. Summary • Isobars • Air Mass • Front • Thunderstorm • Lightning • Thunder • Tornado • Hurricane • Thermometer • Windsock • Anemometer • Weather • Water Cycle • Humidity • Relative Humidity • Condensation • Dew Point • Cloud • Precipitation • Barometer • Wind vane

  16. THE END

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