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Astronomyl 207/l ASTRl 207l Midterml 4l Examl -l ( l 2026/l 2027l Update)l Review l l l Questionsl &l Answersl l Gradel A
Q:l Basedl onl itsl orbit,l Plutol isl al largel memberl of
Answer:
thel Kuiperl belt.
Q:l Onl average,l howl oftenl dol impactorsl aboutl 10l kml inl size,l largel enoughl tol producel massl extinction,l hitl Earth?
Answer:
oncel everyl hundredl millionl years
Q:l Whichl ofl thel followingl wasl thel firstl strongl evidencel forl anl asteroidl impactl beingl thel causel ofl thel extinctionl ofl thel dinosaursl 65l millionl yearsl agol (asl welll asl 75%l ofl alll speciesl alivel atl thel time)?
Answer:
al worldwidel layerl richl inl thel elementl iridiuml thatl datesl tol thatl time
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Q:l Whatl dol wel meanl byl al primitivel meteorite?
Answer:
al meteoritel thatl isl essentiallyl unchangedl sincel itl firstl condensedl andl accretedl inl thel solarl nebulal almostl 4.6l billionl yearsl ago
Q:l Whenl al cometl isl withinl thel innerl solarl system,l itsl visiblel tailsl point
Answer:
awayl froml thel sun
Q:l Howl canl wel determinel thel reflectivityl ofl anl asteroid?
Answer:
byl comparingl itsl brightnessl inl visiblel lightl tol itsl brightnessl inl infraredl light
Q:l Supposel therel werel nol solarl wind.l Howl wouldl thel appearancel ofl al cometl inl ourl innerl solarl systeml bel different?
Answer:
Itl wouldl havel onlyl onel taill insteadl ofl two
Q:l Whatl causedl Earth'sl lithospherel tol fracturel intol plates?
Answer:
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