Investigating Weather Systems. A Review Developed by Carol Swink and Zebetta King with modifications for student review. Weather Instruments. Thermometers measure air temperature. A barometer measures air pressure.
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Developed by Carol Swink and Zebetta King with modifications for student review
weather conditions higher
in the atmosphere.
For some reason, everyone but Lenore got the wrong answer on the science test.
“Tell me,” the teacher asked her after returning the papers, “how did you know that heat causes objects to expand, and cold causes them to shrink?”
“ Because I’m no dope,” she said. “In the summer, when it’s hot, the days are longer. And in the winter, when it’s cold, they’re shorter.”
Teachers Jokes, Quotes, and Anecdotes, p.217
"Convection" has several, related meanings in weather....but it always involves rising air. It usually refers to "moist convection", where the excess water vapor in rising air parcels condenses to form a cloud. The heat released through this condensation can help to sustain the convection by warming the air further and making it rise still higher, which causes more water vapor to condense, so the process feeds on itself.
The word stratus comes from the Latin word that means "to spread out." Stratus clouds are horizontal, layered clouds that stretch out across the sky like a blanket.
The word cumulus comes from the Latin word for a heap or a pile. Cumulus clouds are puffy in appearance. They look like large cotton balls. Cumulus clouds usually form when warm, moist air is forced upward. As this air rises, it is cooled. If it is cooled below its dew - point temperature, condensation will occur.
Cirrus clouds are a third general type of cloud. The word cirrus comes from the Latin word for a tuft or curl of hair. Cirrus clouds are very wispy and feathery looking. They form only at high altitudes, about 7 km above the earth's surface.
Six main factors control temperature and rainfall
Higher latitude = lower average temperature and larger annual temperature ranges
Continental climates = large yearly temperature ranges (interior of continents)
Maritime climates = small yearly temperature ranges
Prevailing westerlies, west coast have cool summers/mild winters and east coasts have hot summers/cold winters
Mountains block winds
Warm currents bring warm temperatures while cold currents bring cold temperatures
Fifth grade students' science curriculum includes a goal that states "the learner will build an understanding of weather and climate". This is a comprehensive webquest designed to be used over a period of days or teachers may choose to focus on only one area.
Information Please Weather Page http://www.infoplease.com/weather.html
National Weather Service http://www.nws.noaa.gov/
Scholastic - Research Tools - Weather http://teacher.scholastic.com/researchtools/articlearchives/weather/index.htm
Weather: What Forces Affect Our Weather? http://www.learner.org/exhibits/weather/
Weather World http://www.ems.psu.edu/WeatherWorld/