Level Green - West Virginia Edition

Chapter 7: Earth in Space


1.	An astronomical unit is __________. Need a Hint?
		A)	smaller than a kilometer
		B)	the distance between Earth and the Sun
		C)	equal to a light-year
		D)	the distance between Earth and the Moon


2.	What separates inner and outer planets? Need a Hint?
		A)	Saturn's rings
		B)	Mercury
		C)	Jupiter
		D)	the asteroid belt


3.	The inner planets are composed mainly of __________. Need a Hint?
		A)	rocks
		B)	gases
		C)	water
		D)	methane


4.	Water is found on which inner planets? Need a Hint?
		A)	Earth and Mercury
		B)	Earth and Venus
		C)	Earth and Mars
		D)	Mars and Venus


5.	Which is the only outer planet that is not a gas giant? Need a Hint?
		A)	Jupiter
		B)	Saturn
		C)	Neptune
		D)	Pluto


6.	Which moon of Jupiter might contain oceans of water? Need a Hint?
		A)	Io
		B)	Callisto
		C)	Europa
		D)	Ganymede


7.	What makes Uranus and Neptune appear blue? Need a Hint?
		A)	methane
		B)	water
		C)	oxygen
		D)	iron


8.	In which direction does a comet's tail always point? Need a Hint?
		A)	toward the Sun
		B)	behind its path
		C)	away from the Sun
		D)	upward from the orbit


9.	Earth's solar system might have begun as a __________. Need a Hint?
		A)	black hole
		B)	nebula
		C)	galaxy
		D)	comet