.png){kind=logo}
Astronomyl 207/l ASTRl 207l Midterml 1l Examl -l (Latestl 2026/l 2027l Update)l 100%l Verifiedl Questionsl &l Answersl |l Gradel A
Q:l Whichl ofl thel followingl statementsl aboutl thel celestiall spherel isl notl true?
A)l whenl wel lookl inl thel sky,l thel starsl appearl tol bel locatedl onl thel celestiall sphere B)l thel celestiall spherel doesl notl existl physically C)l Earthl isl placedl atl thel centerl ofl thel celestiall sphere D)l froml anyl locationl onl Earth,l wel canl seel onlyl halfl thel celestiall spherel atl anyl onel time E)l thel "celestiall sphere"l isl justl anotherl namel forl ourl universe
Answer:
E)l thel "celestiall sphere"l isl justl anotherl namel forl ourl universe
Q:l Howl didl thel Ptolemaicl modell explainl thel apparentl retrogradel motionl ofl thel planets?
A)l itl variedl thel motionl ofl thel celestiall spherel sol thatl itl sometimesl movedl backward B)l itl heldl thatl thel planetsl movedl alongl smalll circlesl thatl movedl onl largerl circlesl aroundl thel Sun C)l itl heldl thatl thel planetsl movedl alongl smalll circlesl thatl movedl onl largerl circlesl aroundl Earth D)l itl placedl thel Sunl atl thel centerl sol thatl thel planets'l apparentl retrogradel motionl wasl seenl asl Earthl passedl eachl onel inl itsl orbit E)l itl heldl thatl sometimesl thel planetsl movedl backwardl alongl theirl circularl orbits
Answer:
B)l itl heldl thatl thel planetsl movedl alongl smalll circlesl thatl movedl onl largerl circlesl aroundl thel Sun
- / 3
Q:l Whichl ofl thel followingl explainsl whyl navigatorsl al fewl hundredl yearsl agol foundl itl muchl morel difficultl tol determinel theirl longitudel thanl theirl latitude?
A)l determiningl longitudel requiresl muchl morel precisel measurementsl ofl anglesl inl thel skyl thanl doesl latitude B)l determiningl longitudel withoutl modernl instrumentsl requiresl beingl ablel tol seel thel Moon C)l determiningl longitudel requiresl havingl anl accuratel clock D)l determiningl longitudel requiresl mathematicall techniquesl thatl werel notl knownl atl thel time
Answer:
C)l determiningl longitudel requiresl havingl anl accuratel clock
Q:l Whichl ofl thel followingl statementsl aboutl constellationsl isl false?
A)l Somel constellationsl canl bel seenl froml bothl thel Northernl andl Southernl hemispheres B)l somel constellationsl canl bel seenl inl bothl thel winterl andl summer C)l mostl constellationsl willl bel unrecognizablel hundredsl ofl yearsl froml now D)l therel arel onlyl 88l officiall constellations E)l itl isl possiblel tol seel alll thel constellationsl froml Earth'sl equator
Answer:
C)l mostl constellationsl willl bel unrecognizablel hundredsl ofl yearsl froml now
Q:l Earthl isl madel mostlyl ofl metall andl rocks.l Wherel didl thisl materiall comel from?
A)l itl wasl madel byl nuclearl fissionl ofl uraniuml andl otherl radioactivel materials B)l itl wasl createdl byl chemicall reactionsl inl interstellarl space C)l itl wasl producedl byl nuclearl fusionl inl stars D)l itl wasl producedl inl thel Bigl Bang E)l itl wasl madel byl ourl Sun
Answer:
C)l itl wasl producedl byl nuclearl fusionl inl stars
- / 3
Q:l Howl arel galaxiesl importantl tol ourl existence?
A)l withoutl galaxies,l therel couldl notl havel beenl al Bigl Bang B)l withoutl galaxies,l thel universel couldl notl bel expanding C)l galaxiesl providel thel gravityl thatl preventsl usl froml fallingl offl Earth D)l galaxiesl recyclel heavyl elementsl producedl inl starsl intol futurel generationsl ofl stars E)l galaxiesl preventl planetsl froml leavingl theirl orbitsl aroundl stars;l e.g.,l ourl galaxyl preventsl Earthl froml leavingl itsl orbitl ofl thel Sun
Answer:
D)l galaxiesl recyclel heavyl elementl producedl inl starsl intol futurel generationsl ofl stars
Q:l Onl al cosmicl calendar,l inl whichl thel historyl ofl thel universel isl compressedl intol 1l year,l whenl didl thel dinosaursl becomel extinct?
A)l inl latel October B)l inl latel November C)l inl latel September D)l inl latel December E)l inl latel August
Answer:
D)l inl latel December
Q:l Howl manyl galaxiesl arel therel inl thel observablel universe?
A)l aboutl asl manyl asl thel numberl ofl grainsl ofl sandl onl alll thel beachesl onl Earth B)l aboutl asl manyl asl thel numberl ofl starsl wel seel inl thel skyl withl ourl nakedl eye C)l roughlyl (withinl al factorl ofl 10)l thel samel asl thel numberl ofl starsl inl ourl galaxy D)l anl infinitel number E)l roughlyl al thousandl timesl morel thanl thel numberl ofl starsl inl ourl galaxy
Answer:
C)l roughlyl (withinl al factorl ofl 10)l thel samel asl thel numberl ofl starsl inl ourl galaxy
- / 3
.png)