Chapter 17 Multiple Choice Quiz 1

Please answer all questions


1	Which of these statements about Kepler's Laws is true?
		A)	Planets travel in circular orbits.
		B)	The time that is required for a planet to complete an orbit is proportional to the square of its radius.
		C)	The retrograde motion of a planet is due to its motion on its epicycle as it also revolves around the sun.
		D)	A planet moves most rapidly when its orbit takes it closest to the sun.


2	Which of the following statements about the length of a planet's day is true?
		A)	The closer the planet is to the sun, the shorter is its day.
		B)	The more massive the planet, the longer its day.
		C)	The four gas giants barely rotate at all.
		D)	None of these are true.


3	Which of the following is true about the surface of Mars?
		A)	There are numerous active volcanoes.
		B)	It is much too cold for liquid water to exist.
		C)	The polar ice caps are frozen water.
		D)	The greenish areas are due to low, scrubby vegetation.


4	Which planets do not have at least one moon?
		A)	Mercury
		B)	Venus
		C)	The first and second planet out from the sun.
		D)	All of the planets have at least one moon.


5	Most of the mass of the solar system is found in
		A)	the terrestrial planets
		B)	the gas giants
		C)	the comets and asteroids
		D)	the sun


6	The smallest planet in the solar system is
		A)	Mercury
		B)	Mars
		C)	Pluto
		D)	Venus


7	Which planet has its axis of rotation tilted so much that it appears to rotate on its side?
		A)	Venus
		B)	Pluto
		C)	Uranus
		D)	Saturn


8	The atmosphere of Venus is predominantly
		A)	carbon dioxide
		B)	nitrogen
		C)	methane
		D)	water vapor


9	Remnants of asteroids or comets that survive the trip through the earth's atmosphere to strike the surface are called
		A)	meteors
		B)	meteorites
		C)	meteoroids
		D)	"shooting stars"


10	Which of the following about Jupiter is not true?
		A)	Jupiter is mostly made of light elements like hydrogen and helium.
		B)	Much of the planet is composed of hydrogen compressed so greatly that it is liquid.
		C)	The colored bands in Jupiter's atmosphere are believed to result from atmospheric convection.
		D)	Because Jupiter is mostly hydrogen, it is only slightly more massive than the earth.

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