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Weather

Weather. What do we know about weather?. How do people measure and predict the weather?. Meteorologist. A scientist who studies the weather What kind of tools do they use?. Thermometer. Used to measure temperature measures the kinetic energy of air molecules

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Weather

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  1. Weather

  2. What do we know about weather? How do people measure and predict the weather?

  3. Meteorologist • A scientist who studies the weather • What kind of tools do they use?

  4. Thermometer • Used to measure temperature • measures the kinetic energy of air molecules • Fahrenheit & Celsius thermometers

  5. Anemometer • Measures wind speed • a system of gears converts the number of turns per minute into wind speed

  6. Hygrometer • Measures humidity • the moisture in the air

  7. Weather Vane • Measures wind direction • changes in wind usually lead to change in weather

  8. Barometer • Measures air pressure • high pressure = clear cool skies • low pressure = cloudy skies, moist air • extreme low pressure = stormy weather

  9. Cloud Conditions • Observing clouds can tell a lot about the weather

  10. Cumulus • White & puffy • fair weather

  11. Cirrus • High in the sky • white • thin & wispy • fair weather

  12. Stratus • Low in the sky • thick & gray • usually bring rain

  13. Cumulonimbus • Tower high into the sky • gray to black • Thunderstorms, hail, tornadoes • anvil shaped

  14. How can rising air pressure lead to a prediction about weather?

  15. Air Mass • A large body of air that has the same temperature and humidity throughout • take on the characteristics of the region over which they form • 4 types in the the USA

  16. Air Masses • Categorized by moisture content and temperature • Moisture categories: m = maritime (wet) and c = continental (dry) • Temperature categories: P (polar; cold), T (Tropical; warm)

  17. Continental Polar • Cool dry weather

  18. Continental Tropical • Hot dry weather

  19. Maritime polar • Cool humid weather

  20. Maritime Tropical • Warm wet weather

  21. Front • Border where two air masses meet • most weather changes occur along a front • cold front = cold air mass moves under a warm air mass creating cumulonimbus clouds • warm front = a warm air mass moves over a cold air mass forming stratus clouds

  22. What kind of air mass causes hot humid weather?

  23. Climate • The regular weather pattern for a region • precipitation & temperature determine climate • seasonal patterns • all patterns are driven by the sun • proximity to the equator determines temperature patterns

  24. ????? • What is the cause of the seasons? • What are two major factors of climate? • What kind of climate would you find near the equator? • What kind of climate would you find at the poles?

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