Name  djdjdjDate 

1. What does the word Planet mean?

2. When was Pluto discovered?
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3. The four planets closest to the Sun--Mercury, Venus, Earth, and Mars--are called the terrestrial planets? YES NO

4. How many planets have rings?

5. What is the mean temperature of Mars at solid surface?

6. What is the mean orbit velocity of Pluto?

7. Neptune has how many moons?

8. Planets are great balls of  .

North Carolina Third Grade Science Goal 3: The learner will build an understanding of the earth/moon/sun system.