讲座天文学三篇dictation.pdf

Listentoadiscussioninanastronomyclass.

(professor)

Todaywellbediscussingtheplanet________Venus_______________,whichisthesecond

planetinour________solarsystem______________.Imsureyouallknowwhichplanetisthe

thirdplanetinourSolarSystem.Yes,Beth?

(Beth)

IsEarththethirdplanet?

(professor)

Youdontsoundtoosureofyouranswer,Beth...but,yes,thatstrue.

_____Venus_________________isthesecondplanetinourSolarSystem,andEarthisthethird.

Venusisalmostthe______________samesize________asourEarth,whichisthefifthlargest

planetin,ah,theSolarSystem.

TheplanetVenusiseasily________visible______________intheskyfromEarth,althoughnot

alwaysasacomplete______sphere________________.Itgoesthroughsome

______________________,justliketheMoon.Sometimesitsfullyvisible,likeafullmoon,

sometimesitshalf______________visible________,andsometimesitsonlyasmall

____________crescent__________.WhendoyouthinkVenusisthebrightest,whenitsfully

visibleorwhenitsacrescent?Mark?

(Mark)

Well,itmakessensethatitwouldbethebrightestwhenitsfullyvisible.

(professor)

Well,thingsarentalwaysastheyseem.Tryagain.

(Mark)

Youmean,Venusisactuallybrighterwhenitsonlyasmall_______crescent

_______________thanwhenitsfullyvisible?

(professor)

ThatactlywhatImeanNow,doesanyoneknowifVenusisahotorcoldplanet?...What

wouldyouexpectsinceVenusisclosertotheSunthanourplaneis?

(Beth)

SinceitssoclosetotheSun,Ithinkitwouldbeveryhot.

(professor)

Anditis.The__________temperature____