fronts - weebly · air masses • air masses are huge chunks of warm or cold air –the whole chunk...
TRANSCRIPT
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Fronts
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DONOW– HWdueFriday
1. Describe convection heat transfer. Example?2. Describe conduction heat transfer. Example?3. Describe radiation heat transfer. Example?4. What way does heat travel? 5. Describe the difference between the heating
and cooling of land and water.6. What is heat capacity? Which has a higher
heat capacity land or water? WHY???7. Describe the difference between climate and
weather USING AN ANALOGY.
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AirMasses
• Air masses are huge chunks of warm or cold air–The whole chunk is
the same temperature and density.
Thinkaboutopeningthedoorafterahotshower!
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Standards/Pep-Talk:• Thisisgoingtobeachallenge– Howareyougoingtotacklethischallenge?
• GoodNews:ThisisyoupushingyourcollegemindandlearningwhatyoucanaboutFrontsfortheday—Iwillbeteachingtomorrowifwemakeafewmistakes
• THINKANDEXPLORE—COMEUPWITHYOUROWNIDEAS—IFYOUUSECLUESYOUCAN’TBEWRONG!!
• CollaborationandCriticalThinkingPushed!– First—workwithyourgroup&readcarefully,thenre-readquestions
– Nextlookbackatpreviousquestions—eachquestionshouldguideyoutothenextoneandthenextone’sanswer
InquiryFrontsLab
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InquiryFrontsLab• Pre-LabNowonyourown• Part2:Guidedwithme• Part3:Guidedwithyourpartner• Conclusion&PushYourself:Onyourown
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DONOW—HWdueFriday1. Lookbackatyourlab:Whatarethe4namesfor
fronts?(2arenamedinyourconclusionand2younamedyourself)
2. Whatisanairmass?Whatarethe4differenttypesofairmasses?
3. Whatdidyoudefineafrontasyesterdayinourlab?
4. Howdidyoudoyesterdayonourchallenginglab—didyoupushyourselfandyourgroup?Whatdidyoudowell?Whatdoyouneedtodoabetterjobat?
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WhatareFronts?• Fronts happen when 2
different air masses meet and weather occurs.
• 4 Different Types of Fronts:
• Cold Front
• Warm Front
• Occluded Front
• Stationary FrontFronts: Mr Parr Rap Song
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AllFronts:Commonalities/Similarities
• Always causes rain or storms
• 2-3 Air masses are meeting
• Cold air (more dense) ALWAYS sinks under warm air (less dense).
Video on Air Masses: http://www.youtube.com/watch?v=vPC5i6w3yDI&feature=related
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Demos:
• http://www.classzone.com/books/earth_science/terc/content/visualizations/es2002/es2002page01.cfm?chapter_no=visualization
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ColdFronts
� Whenafastmovingcoldairmassrunsintoaslowmovingwarmairmass
� Thethickercoldairslidesunderthelighterwarmerair(DENSITY)
� Warmairrisesandformsclouds.
� Weatherforecast: heavyrainsandthunderstorms
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ColdFront:Weathermapsymbol
• A cold front symbol—The direction that the teeth point indicate the direction the front is moving.
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WarmFronts �Whenafastmovingwarmairmasscollideswithaslowlymovingcoldairmass
�Warmairmovesoverthecoldair.
�Weatherforecast:slowsteadyrain!
http://www.youtube.com/watch?v=w8oIDvvx8Fk
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Warmfront:WeatherMapSymbol
• Warm Front symbol—The directions that the bumps face is the direction the front is moving.
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Whattypesoffrontscanyoufindonthemap?Inwhichdirectionaretheymoving?
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CheckForUnderstandingQuestions
• What did you find similar between a cold and a warm front?
• Which air masses move up and which air masses move down in each front?
• What type of weather does each front produce?
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StationaryFront
OccludedFrontWarmFront
ColdFrontHHighPressure
LLowPressure
30°C
14°C
15°C
12°C
28°C 21°C
20°C
26°C
25°C19°C
MondayWeatherLittleRock,AR
Sun&clearskiesCool=15°C
TuesdayWeatherLittleRock,AR
Clouds&RainWarmer=21°C
WednesdayWeatherLittleRock,AR
PartlySunnyWarmer=26°C
Whichdirectionisthewarmfrontmoving?
WhatwillhappentotheweatherinLittleRock?
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StationaryFront
OccludedFrontWarmFront
ColdFrontHHighPressure
LLowPressure
18°C
10°C8°C
20°C
ThursdayWeatherNashville,TN
PartlySunnyWarm=20°C
15°C
11°C
10°C
10°C
Whichdirectionisthecoldfrontmoving?
WhatwillhappentotheweatherinNashville?
FridayWeatherNashville,TN
ThunderstormsCooler=15°C
SaturdayWeatherNashville,TN
SunnyCool=10°C
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StationaryFront�Whenacoldairmassandwarmairmassmeet,butneitherairmasshasenoughforcetomovetheotherairmass.
� Stayinthesameareaforlongperiodsoftime
�Weatherforecast:clouds,rain
� CansometimesmixtogetherORwillturnintoawarmorcoldfront.
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StationaryFront:WeatherMapSymbol
Not moving in any direction!
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Whattypesoffrontscanyoufindonthemap?Inwhichdirectionaretheymoving?
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OccludedFront• When a warm air mass
is caught between two cooler air masses and
• The thicker cold air masses move underneath the thinner warm air mass and push it upward.
• Weather forecast: usually precipitation falls
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OccludedFront:WeatherMapSymbol
• Occluded front symbol – The directions that the bumps face is the direction the front is moving.
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SummaryofFrontSymbols
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PracticeReadingWeatherMapsWhichtypesoffrontscanyoufindonthis
map?
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Think,Pair,Share!
• What did you find similar between a stationary front and a occluded front?
• Which way do the air masses move for each front?
• What type of weather does each front produce?
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ColdFront WarmFront StationaryFront
OccludedFront
Whatishappening?(Writeit)
Whatishappening?(Drawit)
Weatherforecast
Symbol
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ExitTicket&homeworkdueTOMORROW!
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Catalyst– HWONDESK!!!1. Whatisafront?Whatisanairmass?2. Whatarethe4differenttypesofairmasses?3. Givethedefinition,weatherforecast,and
weathersymbolforeachofthefronts.– Cold– Warm– Stationary– Occluded
4. Listanddefinethe3differentheattransfers.5. Whatisthedifferencebetweenweatherand
climate?
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METEOROLOGYQUIZ1
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FrontsWeatherMapProjectBoards–yesthisisforagrade…
• Youaregoingtocreateafrontsweathermap.
• Youareeachgoingtogetasmallpieceofposerpaper&frontsarrows.
• Youaregoingtousethearrowstoillustratethedifferenttypesoffrontsthatandwhatdirectiontheyaremovingin.
• UsePage490inthebigtextbookasyourguide
• THISISTHEONLYDAYWEWILLWORKONTHIS…SOYOUNEEDTOWORKDILIGENTLY!!!!
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TimeFrameforClasstoday(65mins)
• Catalyst— 10mins• DirectionsfromMs.P– 10mins• Readingintextbookpg.490- 5mins• Writingdefinitions,weathersymbol&weatherforecastonposter- 10mins
• Cutting- 5mins• Placingandgluing&writingonarrows- 10mins• ExitTicket- 10mins
Wiggleroom- 5mins
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EXITTICKET
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Catalyst– Quizreview
1. Whatisthedifferencebetweenweatherandclimate?
2. DenverColoradohasarelativelycoldclimate.Itsaverageisbetween30o-50o F.WhatlineoflatitudewouldthecityofDenvermostlikelybelocatedat:15o latitude,25o latitude,40o latitudeandwhy?
3. Whatisheatcapacity?Waterhasthehighestheatcapacity.Whatdoesthisstatementmean?
4. Thebeachiswarmerduringtheday,buttheoceaniswarmeratnight.Why???