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OurSolarSystem:Theories
2/24/17
DONOW—HWDUETODAY1.Whatarethethreetypesofgalaxies?Describeeach.2.Compareandcontrastthe2theoriesoftheuniverse.3.Orderthefollowinginorderfrombiggesttosmallest:galaxy,planets,sun,moon.4.Whatarethe5stepsforthebigbangtheory?5.ExplainwhyastarbecomesaRedGiant—whatishappeningtoit?6.Explainwhatastaris—whatisitmadeofandhowdoesitstaytogether?
Reminders:
QuizWednesday3/1—study!– TheoriesoftheUniverse– TypesofGalaxies– TheoriesoftheSolarSystem– Planets(inner/outer)
Review:WhatisaSolarSystem?
• Universeà Galaxyà SolarSystemàSun/Planets/Moons
• Asolarsystemisastar,andalloftheplanetsandotherobjectsthatorbitthatstar.– Oursunisastar,andtheEarthisoneoftheplanetsthatorbitsit.
– BUTHAVEPEOPLEALWAYSBELIEVEDTHIS?????
TheGreatDebate:ModelsofOurSolarSystem
• ActorsandActresseswillbepickedatrandom!• Lookunderyourdesks!• Lettheshowbegin!
AnswerQuestionsinGuidedPractice
7.WhatwasthefirstdiscoverythatGalileomade?Whydoesthissuggestthatthesuncouldbethecenterofthesolarsystem?
8.Whatmodelofthesolarsystemdowenowknowtobetrue?
Ptolemy’sModeloftheSolarSystem:
GeocentricModelGeoisGreekforEarth
à Inthismodel,Earthisatthecenterofthesolarsystemandeverythingelseintheuniverseorbited(traveledaround)theearth
Copernicus’ModeloftheSolar
System:
HeliocentricModelHeliosisGreekforSun
àInthismodel,theSUNisthecenterofthesolarsystemandtheEarthandotherplanetsorbitaroundtheSUNincircles.
Galileo’sProofoftheHeliocentricModel
1.Jupiter’smoonsrevolvearoundit!
2.OurviewofVenusfromEarthchangeslikethephasesofthemoon.
ISAYGEOYOUSAY
•EARTH
ISAYHELIOYOUSAY
•SUN
StopandJotConnectourlessonsonthescientificmethodwithourlessontodayon
SolarSystemTheories.
Fromwhatyouhaveseenandheardtodayandfromwhatyousawinyourlabsthepreviousclass,doscientifictheorieschangeovertime?Whydotheychangeovertime?
Howisthisdebaterelatedtothescientificmethod?
• Theoriesareideasbackedbyevidence– Butthatdoesnotmeanthattheycannotbewrong!
• Scientistsarealwaysdiscoveringnewthings,andwhennewthingsarediscovered,theorieshavetochange.(Thinkofourmysterylab!)– Thatisthenatureofscience!
Catalyst– HWdueFriday;quizFriday
1. Whatdoestheprefix“geo-”mean?2. Explainthegeocentricmodelofthesolarsystem.3. Whatdoestheprefix“helio-”mean?4. Explaintheheliocentricmodelofthesolarsystem.5. Whatarethe3typesofgalaxies?Explaineach.6. Whatarethe2theoriesoftheuniverse?Explain
eachone.7. Listthestepstoformastar?8. Whatarethenamesofthe3constellationsthatwe
learnedabout?
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