Fronts

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.

AirMasses

• Air masses are huge chunks of warm or cold air–The whole chunk is

the same temperature and density.

Thinkaboutopeningthedoorafterahotshower!

Standards/Pep-Talk:• Thisisgoingtobeachallenge– Howareyougoingtotacklethischallenge?

• GoodNews:ThisisyoupushingyourcollegemindandlearningwhatyoucanaboutFrontsfortheday—Iwillbeteachingtomorrowifwemakeafewmistakes

• THINKANDEXPLORE—COMEUPWITHYOUROWNIDEAS—IFYOUUSECLUESYOUCAN’TBEWRONG!!

• CollaborationandCriticalThinkingPushed!– First—workwithyourgroup&readcarefully,thenre-readquestions

– Nextlookbackatpreviousquestions—eachquestionshouldguideyoutothenextoneandthenextone’sanswer

InquiryFrontsLab

InquiryFrontsLab• Pre-LabNowonyourown• Part2:Guidedwithme• Part3:Guidedwithyourpartner• Conclusion&PushYourself:Onyourown

DONOW—HWdueFriday1. Lookbackatyourlab:Whatarethe4namesfor

fronts?(2arenamedinyourconclusionand2younamedyourself)

2. Whatisanairmass?Whatarethe4differenttypesofairmasses?

3. Whatdidyoudefineafrontasyesterdayinourlab?

4. Howdidyoudoyesterdayonourchallenginglab—didyoupushyourselfandyourgroup?Whatdidyoudowell?Whatdoyouneedtodoabetterjobat?

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

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

Demos:

• http://www.classzone.com/books/earth_science/terc/content/visualizations/es2002/es2002page01.cfm?chapter_no=visualization

ColdFronts

� Whenafastmovingcoldairmassrunsintoaslowmovingwarmairmass

� Thethickercoldairslidesunderthelighterwarmerair(DENSITY)

� Warmairrisesandformsclouds.

� Weatherforecast: heavyrainsandthunderstorms

ColdFront:Weathermapsymbol

• A cold front symbol—The direction that the teeth point indicate the direction the front is moving.

WarmFronts �Whenafastmovingwarmairmasscollideswithaslowlymovingcoldairmass

�Warmairmovesoverthecoldair.

�Weatherforecast:slowsteadyrain!

http://www.youtube.com/watch?v=w8oIDvvx8Fk

Warmfront:WeatherMapSymbol

• Warm Front symbol—The directions that the bumps face is the direction the front is moving.

Whattypesoffrontscanyoufindonthemap?Inwhichdirectionaretheymoving?

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?

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?

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

StationaryFront�Whenacoldairmassandwarmairmassmeet,butneitherairmasshasenoughforcetomovetheotherairmass.

� Stayinthesameareaforlongperiodsoftime

�Weatherforecast:clouds,rain

� CansometimesmixtogetherORwillturnintoawarmorcoldfront.

StationaryFront:WeatherMapSymbol

Not moving in any direction!

Whattypesoffrontscanyoufindonthemap?Inwhichdirectionaretheymoving?

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

OccludedFront:WeatherMapSymbol

• Occluded front symbol – The directions that the bumps face is the direction the front is moving.

SummaryofFrontSymbols

PracticeReadingWeatherMapsWhichtypesoffrontscanyoufindonthis

map?

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?

ColdFront WarmFront StationaryFront

OccludedFront

Whatishappening?(Writeit)

Whatishappening?(Drawit)

Weatherforecast

Symbol

ExitTicket&homeworkdueTOMORROW!

Catalyst– HWONDESK!!!1. Whatisafront?Whatisanairmass?2. Whatarethe4differenttypesofairmasses?3. Givethedefinition,weatherforecast,and

weathersymbolforeachofthefronts.– Cold– Warm– Stationary– Occluded

4. Listanddefinethe3differentheattransfers.5. Whatisthedifferencebetweenweatherand

climate?

METEOROLOGYQUIZ1

FrontsWeatherMapProjectBoards–yesthisisforagrade…

• Youaregoingtocreateafrontsweathermap.

• Youareeachgoingtogetasmallpieceofposerpaper&frontsarrows.

• Youaregoingtousethearrowstoillustratethedifferenttypesoffrontsthatandwhatdirectiontheyaremovingin.

• UsePage490inthebigtextbookasyourguide

• THISISTHEONLYDAYWEWILLWORKONTHIS…SOYOUNEEDTOWORKDILIGENTLY!!!!

TimeFrameforClasstoday(65mins)

• Catalyst— 10mins• DirectionsfromMs.P– 10mins• Readingintextbookpg.490- 5mins• Writingdefinitions,weathersymbol&weatherforecastonposter- 10mins

• Cutting- 5mins• Placingandgluing&writingonarrows- 10mins• ExitTicket- 10mins

Wiggleroom- 5mins

EXITTICKET

Catalyst– Quizreview

1. Whatisthedifferencebetweenweatherandclimate?

2. DenverColoradohasarelativelycoldclimate.Itsaverageisbetween30o-50o F.WhatlineoflatitudewouldthecityofDenvermostlikelybelocatedat:15o latitude,25o latitude,40o latitudeandwhy?

3. Whatisheatcapacity?Waterhasthehighestheatcapacity.Whatdoesthisstatementmean?

4. Thebeachiswarmerduringtheday,buttheoceaniswarmeratnight.Why???