Astronomy

1.
	The heliocentric model was actually first proposed by:   Student Response Value Correct Answer A. Alexander the Great.   B. Archimedes.    C. Aristarchus. 100%    D. Hipparchus.   E. Aristotle.   Score: 1/1
2.
	Which of the following is a contribution to astronomy made by Galileo?   Student Response Value Correct Answer A. The Moon has craters, mountain, valleys, and dark flat areas on its surface.   B. The astronomical telescope can show us far more detail than the eye can.   C. Venus appears almost fully lit when it lies on the far side of the Sun.   D. Jupiter has four moons orbiting it.    E. all of the above 100%    Score: 1/1
3.
	Which of these was NOT a part of the original Copernican model?   Student Response Value Correct Answer A. Mercury must move faster in its orbit than any other planet.   B. The Sun lies at the center of the solar system.    C. Mercury speeds up at perihelion, and slows down at aphelion. 100%    D. The Earth rotates on its axis once a day.   E. Venus can go all the way around the Sun.   Score: 1/1
4.
	The Ptolemaic model of the universe:   Student Response Value Correct Answer A. always kept Mars and Mercury between the Earth and Sun.   B. describes the orbits of the planets as being ellipses, not circles.   C. could not account for the stellar parallax observed by Hipparchus.    D. explained and predicted the motions of the planets with deferents and epicycles. 100%    E. is the basis of our modern cosmology.   Score: 1/1
5.
	Which of these was NOT a telescopic discovery of Galileo?   Student Response Value Correct Answer  A. the moons of Saturn 100%    B. sunspots and the rotation of the Sun   C. the craters and mare of the Moon   D. the four largest moons of Jupiter   E. the phases of Venus   Score: 1/1
6.
	A circular orbit would have an eccentricity of   Student Response Value Correct Answer A. between 0 and 0.5.   B. between 0.5 and 1.   C. exactly 1.0.    D. 0. 100%    E. infinity.   Score: 1/1
7.
	Galileo found the rotation period of the Sun was approximately   Student Response Value Correct Answer A. three months.   B. a year.   C. a week.    D. a month. 100%    E. a day.   Score: 1/1
8.
	According to Kepler's third law, the square of the planet's period in years is:   Student Response Value Correct Answer A. equal to its perihelion distance from the Sun in A.U.   B. equal to the fourth power of its average temperature in degrees Kelvin.   C. inversely proportional to its mass in kilograms.   D. equal to the square of its aphelion distance in A.U.    E. proportional to the cube of its semimajor axis in A.U. 100%    Score: 1/1
9.
	A planet whose distance from the Sun is 3 A.U. would have an orbital period of how many Earth-years?   Student Response Value Correct Answer A. 81   B. 3   C. 9   D.    E. 100%    Score: 1/1
10.
	The Law of Universal Gravitation was developed by:   Student Response Value Correct Answer A. Galileo.   B. Copernicus.   C. Kepler.   D. Einstein.    E. Newton. 100%    Score: 1/1
11.
	Kepler's second law implies what about planetary motion?   Student Response Value Correct Answer A. This law implies nothing about a planet's motion.   B. A planet moves faster when it is farther from the Sun.   C. A planet moves slower when it is closer to the Sun.   D. A planet moves at a constant speed during its orbit of the Sun.    E. A planet moves faster when it is closer to the Sun. 100%    Score: 1/1
12.
	According to Copernicus, retrograde motion for Venus must occur around   Student Response Value Correct Answer A. superior conjunction, when the planet is on the far side of the Sun.   B. opposition, when the planet lies opposite the Sun in the sky.   C. greatest elongation, when the planet is farthest from the Sun.    D. inferior conjunction, when it passes between us and the Sun. 100%    E. quadrature, when the planet is 90 degrees away from the Sun.   Score: 1/1
13.
	When a planet retrogrades, it appears to move westward for weeks at a time. Student Response Value Correct Answer True 100% True Score: 1/1
14.
	Kepler based his theories on the precise planetary observations of Tycho Brahe. Student Response Value Correct Answer True 100% True Score: 1/1
15.
	The orbits of most of the planets have eccentricities close to zero. Student Response Value Correct Answer True 100% True Score: 1/1
16.
	Newton's Laws completely replaced the incorrect work of Kepler. Student Response Value Correct Answer False 100% False Score: 1/1
17.
	Kepler found the orbits of planets are ellipses, not circles. Student Response Value Correct Answer True 100% True Score: 1/1
18.
	Newton's modification of Kepler's Third Law lets us measure the mass of the Sun. Student Response Value Correct Answer True 100% True Score: 1/1
19.
	Newton's gravity would explain why Saturn, so far from the Sun, moves so slowly across the sky. Student Response Value Correct Answer False 100% False Score: 0/1
20.
	According to Newton's second law, if you double the force acting on a body, the acceleration will double. Student Response Value Correct Answer True 100% True Score: 1/1