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Vocabulary
Inner Planets
Outer Planets
The Sun
Miscellaneous
100
The _______ is made of the planets, moons, and other bodies that orbit the Sun.
Solar System
100
Which inner planet has the hottest average temperature?
Venus
100
Which outer planet has the most moons?
Jupiter
100
The Sun has almost _____% of the mass in the solar system.
99%
100
What is the name of Pluto's moon?
Charon
200
A _____ is a huge ball of very hot gas that gives off light energy.
A Star
200
Which inner planet has the most moons?
Mars with two
200
Which space probe studied the rings of Saturn?
Voyager
200
Name all three layers of the Sun.
Chromosphere, Photosphere, Corona
200
Pluto is classified as a _____ planet.
Dwarf
300
A(n) ______ is a shape similar to an oval.
Ellipse
300
Which inner planet has the length of day closest to that of Earth's as measured in Earth time?
Mars
300
Which two of the outer planets' atmospheres are the same?
Uranus and Neptune
300
A(n) ________ looks like a ribbon of flowing gases.
Prominence
300
The ______ is a giant cloud of dust and evaporated gases that surround the nucleus of a comet.
Coma
400
A(n) is a frozen mass of different types of ice and dust that orbits the sun.
Comet
400
In 1972, scientists sent up this prove to visit Mercury.
Mariner 10
400
Uranus is a gas giant with a large _______core
Liquid
400
The number of sunspots change in cycles of about how many years?
11 Years
400
_______ happens because astronauts are in free fall.
Weightlessness
500
A(n) ______ is a rocky object up to several hundred kilometers wide that revolves around the sun.
Asteroid
500
How were the craters on the moon formed?
Meteroites
500
Which of the outer planets have rings?
All of them!
500
Not counting the sun, what is the nearest star to Earth?
Alpha Centauri
500
Name the two robots rivers that visited Mars in 2004.
Spirit and Opportunity