Mercury
Venus
Earth
Mars
Other
100
Mercury is the planet closest to the sun and the smallest ______
What is terrestrial planet
100
one can sometimes see Venus in the west after
What is sunset
100
Earth is unique in our solar system since it has ________ at it's surface
What is liquid water
100
the atmosphere of Mars is more than 95 percent
What is carbon dioxide
100
the inner planets are often called this
What are the terrestrial planets
200
Mercury's high daytime temperature cause ______ to move very fast
What are gas particles
200
Venus's density and internal structure are similar to ______'s
What is Earth
200
three main layers of Earth
What are the crust, mantle, and core
200
the Italian astronomer who announced that he had seen long, straight lines on Mars
Who is Giovanni Schiaparelli
200
the trapping of heat by the atmosphere
What is the greenhouse effect
300
Mercury has virtually no _________
What is atmosphere
300
Venus takes about _____ Earth months to revolve around the sun
What is 7.5
300
what percent of Earth's surface is covered with water
What is 70
300
name of the two space probes sent to Mars
What is Spirit and Opportunity
300
the largest inner planet
What is Earth
400
the first of these called ______ was scheduled to go into orbit around Mercury in 2011
What is MESSENGER
400
the largest volcano on Venus
What is Maat Mons
400
Earth can hold onto most ______
What are gases
400
the largest volcano in the solar system
What is Olympus Mons
400
this planet rotates in the opposite directions from most other planets and moons
What is Venus
500
much of what astronomers know about Mercury's surface came from this probe
What is Mariner 10
500
the name of first probe that landed on Venus
What is Venera 7
500
the states of matter that Earth has suitable range for
What is liquid, gas, or solid
500
the names of Mar's two moons
What are Phobos and Deimos
500
this planet's atmosphere is so heavy that it would crush a human
What is Venus
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