Astronomy college course/Mercury/questions

Shortest period b/c it's closest. (As per Kepler' III) Law Synodic = as seen from earth. Syn = together as in Jewish Synagog Proximity to Sun: Morning and Evening "star". Rotation is tidally or gravitationally locked in 3:2 resonance (review Earth moon situaton, resonance is 3x=2y) Highly elliptical orbit: Speeds up and slows down Looks like Moon: dead "inactive" geology billions of years. Solar sytem is 5 billion years, Universe is 15 billion (roughly).

AstroMercury_Study
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AstroMercury_Study-v1s1
/1/. The horizontal crack along the center of figure is a
 * ___ a) meander


 * ___ b) scarp


 * ___ c) rille


 * ___ d) antipodal


 * ___ e) propodal

/2/. Antipodal to Caloris Basin is
 * ___ a) an iron/nickel deposit


 * ___ b) a scarp


 * ___ c) a water deposits


 * ___ d) weird terrain


 * ___ e) a silicon deposits

/3/. A volatile is a substance that
 * ___ a) reacts violently with acids


 * ___ b) reacts violently with oxygen


 * ___ c) reacts violently with water


 * ___ d) melts or evaporates at low temperature


 * ___ e) melts or evaporates at high temperature

/4/. The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are primarily composed of ___ and ___.
 * ___ a) carbon and oxygen


 * ___ b) metal and rock


 * ___ c) ice and rock


 * ___ d) ice and water


 * ___ e) ice and gas

/5/. If the universe is mostly hydrogen, why aren't terrestrial planets made of mostly hydrogen?
 * ___ a) tidal forces between the terrestrial planets prevented accretion


 * ___ b) tidal forces from the Sun prevented accretion


 * ___ c) thermonuclear fusion in the protosun turned the hydrogen into helium


 * ___ d) These planets lie inside the frost line for hydrogen


 * ___ e) tidal forces from Jupiter prevented accretion

/6/. Mercury's atmosphere consists mostly of
 * ___ a) carbon dioxide


 * ___ b) hydrogen


 * ___ c) nitrogen


 * ___ d) oxygen


 * ___ e) helium

/7/. In what sequence did Mercury's weird terrain and Caloris basin form?
 * ___ a) The weird terrain was formed a few millions years after the Caloris basin


 * ___ b) The weird terrain was formed approximately 2 billions years before the Caloris basin


 * ___ c) The weird terrain was formed approximately 2 billions years after the Caloris basin


 * ___ d) The were formed at exactly the same time


 * ___ e) The weird terrain was formed almost immediately after the Caloris basin

Key to AstroMercury_Study-v1s1
/1/. The horizontal crack along the center of figure is a
 * - a) meander


 * + b) scarp


 * - c) rille


 * - d) antipodal


 * - e) propodal

/2/. Antipodal to Caloris Basin is
 * - a) an iron/nickel deposit


 * - b) a scarp


 * - c) a water deposits


 * + d) weird terrain


 * - e) a silicon deposits

/3/. A volatile is a substance that
 * - a) reacts violently with acids


 * - b) reacts violently with oxygen


 * - c) reacts violently with water


 * + d) melts or evaporates at low temperature


 * - e) melts or evaporates at high temperature

/4/. The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are primarily composed of ___ and ___.
 * - a) carbon and oxygen


 * + b) metal and rock


 * - c) ice and rock


 * - d) ice and water


 * - e) ice and gas

/5/. If the universe is mostly hydrogen, why aren't terrestrial planets made of mostly hydrogen?
 * - a) tidal forces between the terrestrial planets prevented accretion


 * - b) tidal forces from the Sun prevented accretion


 * - c) thermonuclear fusion in the protosun turned the hydrogen into helium


 * + d) These planets lie inside the frost line for hydrogen


 * - e) tidal forces from Jupiter prevented accretion

/6/. Mercury's atmosphere consists mostly of
 * - a) carbon dioxide


 * + b) hydrogen


 * - c) nitrogen


 * - d) oxygen


 * - e) helium

/7/. In what sequence did Mercury's weird terrain and Caloris basin form?
 * - a) The weird terrain was formed a few millions years after the Caloris basin


 * - b) The weird terrain was formed approximately 2 billions years before the Caloris basin


 * - c) The weird terrain was formed approximately 2 billions years after the Caloris basin


 * - d) The were formed at exactly the same time


 * + e) The weird terrain was formed almost immediately after the Caloris basin


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 * http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Mercury/questions&oldid=1388427
 * Study guide
 * http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Mercury&oldid=1381954