# A planet is in orbit around the sun the semimajor

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A planet is in orbit around the Sun. The semimajor axis of the orbit is 5 Astronomical Units (AU). UseP2= a3to calculate the period of the orbit in years.A)5 yearsB)11.2 yearsC)125 yearsD)135 yearsE) 0.2 yearsPoints Earned:2.0/2.0Correct Answer(s):B37.Could astronauts survive on the surface of Titan without a space suit; maybe just an oxygen mask orsomething?A)No, the atmosphere isn't thick enoughB)Yes.C)No, it's far too cold.D)No, the pressure would be too great.E)No, there's a runaway greenhouse effect like Venus.Points Earned:2.0/2.0Correct Answer(s):C38.As the solar nebula collapsed, it became a disk because:A)it went splat on a pancake griddleB)the overall rotation of the nebula plus collisions between particles made the particlesgo in more or less the same directionC)the Sun's gravity pulled the nebula material into a planeD)the initial cloud was disk shapedE)the self-gravity of the nebula pulled the material into a planePoints Earned:2.0/2.0Correct Answer(s):B39.… 82/155
3/30/2015Test 2 PollockWhat was Kepler's Third Law?A) The time period for an orbit of a planet is proportional to the cube of its average distance fromSun (in other words P is proportional to a3).B) The farther away a planet is from the Sun, the shorter a time it takes for it to complete one orbitaround the Sun.C) The closer a planet is to the Sun, the longer a time it takes for it to complete one orbit aroundthe Sun.D) The square of the time period for an orbit of a planet is proportional to cube of its averagedistance from Sun (in other words P2is proportional to a3).E) The cube of the time period of the planet's orbit is proportional to the square of its averagedistance from the Sun (P3is proportional to a2).Points Earned:2.0/2.0Correct Answer(s):D40.The densities of the four Terrestrial planets are similar to each other. ThismeansA)they have approximately the same radiiB)they have approximately the same massesC)they are approximately the same temperatureD)they have the same surface gravitiesE)they are made of similar substancesPoints Earned:2.0/2.0Correct Answer(s):E41.Saturn is made of:A)Nickel and Iron like the cores of rocky planets.B)Water and Ammonia ices.C)Nitrogen and Oxygen like Earth's atmosphere.D)Hydrogen and Helium like JupiterE)Green cheesePoints Earned:2.0/2.0Correct Answer(s):D42.What is Jupiter like below the top cloud layers?A)A rocky core under a thick atmosphere… 83/155
3/30/2015Test 2 PollockB)A rocky core under a thin atmosphereC)It is made of peanut butterD)It's pure atmosphereE)It's gaseous on the outside, then liquid hydrogen, then more dense metallic hydrogen, possiblysurrounding a solid corePoints Earned:2.0/2.0Correct Answer(s):EPoints Earned:2.0/2.0Correct Answer(s):D44.Which moon of Jupiter is believed to have a liquid ocean beneath a layer of ice?

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