Weather Lesson 61.

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Presentation transcript:

Weather Lesson 61

Activator What exactly is weather? https://www.nps.gov/common/uploads/teachers/lessonplans/ClimateVWeatherWorks heet.pdf Venn Diagram http://www.softschools.com/difference/climate_vs_weather/41/ Definition

Weather The state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, and rain. Describes the short-term state of the atmosphere (different from climate)

Causes of Weather Earth is round  the Sun's rays don't fall evenly on the land and oceans. Differences in temperature create a restless movement of air and water in great swirling currents to distribute heat energy from the Sun across the planet When warm and cool air currents meet, it creates different weather

Air Movement and Weather The location where two air masses meet is called a FRONT. Cold fronts (blue) occur where a cold air mass is replacing a warm air mass. Warm fronts (red) occur where warm air replaces cold air.

Fronts and the Weather They Bring *Colder air is more dense than warmer air Cold fronts: Cold air catches up with warm air and forces the warm air up quickly creating abrupt large clouds Warm fronts: Warm air catches up with cold air and forces the warm air up at a more gradual slope. Creates high level clouds and eventually precipitation Weather explained https://www.youtube.com/watch?v=G7Ewqm0YHUI https://www.youtube.com/watch?v=CjubUXlxJKY

Fronts Continued Occlude front: Cold front over takes a warm front Produces a lot of precipitation https://www.youtube.com/watch?v=Mfm8H8asRa4 Stationary Front: Boundary between hot and cold front that does not move Lots of precipitation and thunderstorms Common in summer https://www.youtube.com/watch?v=PgPbsAK39hw

Classwork Brain break: Spot the difference https://www.youtube.com/watch?v=10kltoJivqA http://sctritonscience.com/Wilson/coordinated/wks%20labs%20quizzes/unit% 204/worksheet%20weather%20fronts.pdf http://www.panthercountry.org/userfiles/267/Classes/608/17%20Fronts%20W orksheet.pdf