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Astronomyl 209/l ASTRl 209l Midterml 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 Sun'sl photospherel isl NOTl TRUE?
Answer:
Thel photospherel isl significantlyl hotterl thanl alll thel layersl ofl thel Sunl beneathl itl (furtherl inward)
Q:l Thel tenl millionl tonsl ofl particlesl thatl escapel thel Sunl eachl yearl inl thel forml ofl thel solarl windl getl outl mainlyl throughl regionsl called
Answer:
Coronall Holes
Q:l Thel granulationl patternl thatl astronomersl havel observedl onl thel surfacel ofl thel Sunl
tellsl usl that:
Answer:
Hotl materiall mustl bel risingl froml thel Sun'sl hotterl interior
Q:l Sunspotsl arel darkerl thanl thel regionsl ofl thel Sunl aroundl theml because
Answer:
Theyl arel coolerl thanl thel materiall aroundl theml (althoughl stilll veryl hotl comparedl tol Earthl temperatures)
Q:l Whichl statementl aboutl thel Sun'sl rotationl isl TRUE?
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Answer:
Thel Sunl rotatesl atl differentl ratesl atl differentl latitudesl onl thel Sun
Q:l Howl dol astronomersl knowl howl strongl thel magneticl fieldl ofl thel Sunl is?
Answer:
Thel measurel thel Zeemanl effectl (thel splittingl ofl spectrall lines)
Q:l Spacemanl Spiffl preparesl tol launchl hisl shipl andl noticesl thatl hisl windowl isl transparent.l Thisl meansl hisl window
Answer:
transmitsl lightl well
Q:l Whatl isl al molecule?
Answer:
Al groupl ofl twol orl morel atomsl boundl together
Q:l Whatl isl thel overalll electricall chargel ofl anl atoml withl 6l protons,l 6l neutrons,l andl 5l electrons?
Answer:
+1
Q:l Atl extremelyl highl temperaturesl (e.g.l millionsl ofl degrees),l whichl ofl thel followingl bestl describesl thel phasel ofl matter?
Answer:
Al plasmal consistingl ofl positivelyl chargedl ionsl andl freel electrons
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Q:l Whenl al neutrall atoml losesl anl electron,l wel sayl thatl itl becomes
Answer:
ionized
Q:l Anl electron-voltl is
Answer:
anl amountl ofl energyl muchl smallerl thanl al joule
Q:l Whatl dol wel seel whenl whitel lightl passesl throughl al cooll cloudl ofl gas?
Answer:
anl absorptionl linel spectrum
Q:l Whatl mustl bel truel inl orderl forl anl atoml tol absorbl al photon?
Answer:
Thel photonl mustl havel energyl matchingl thel differencel inl energyl betweenl twol energyl levelsl inl thel atoml ORl thel photonl mustl havel enoughl energyl tol removel anl electronl froml thel atom
Q:l Howl doesl thel spectruml ofl al moleculel differl froml thel spectruml ofl anl atom?
Answer:
Al moleculel hasl additionall spectrall linesl duel tol changesl inl itsl rotationall andl vibrationall energies
Q:l Froml laboratoryl measurements,l wel knowl thatl al particularl spectrall linel formedl byl hydrogenl appearsl atl al wavelengthl ofl 121.6l nanometersl (nm).l Thel spectruml ofl al particularl starl showsl thel samel hydrogenl linel appearingl atl al wavelengthl ofl 121.8l nm.l Whatl canl wel conclude?
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