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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