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Name: _______________________________________ Science Quiz – Planets Homeroom: ____________ 1. Neptune is made of several different types of _______________. A. gases B. rocks C. ice D. minerals 2. Pluto was once considered a planet but is now classified as _______________. A. a moon B. a meteorite C. an asteroid D. a dwarf planet 3. What keeps planets in their orbit around the Sun? A. the gravity of the Sun B. the gravity of the Milky Way C. the gravity of the stars D. the gravity of the moon 4. This planet is the fifth from the Sun, the largest in the solar system, and is made of gas. A. Saturn B. Uranus C. Jupiter D. Mercury 5. Which of these are known as the inner planets? A. Venus, Earth, Mars, Jupiter B. Saturn, Uranus, Neptune, Pluto C. Jupiter, Saturn, Uranus, Neptune D. Mercury, Venus, Earth, Mars 6. Which planet takes the longest to revolve around the sun? A. Mercury B. Neptune C. Jupiter D. Earth 7. Which is true of ALL planets? A. They all rotate at the same speed. C. They all rotate and revolve around around the moon. B. They all have their own moons. D. They all rotate and revolve around the sun. 8. Mars is nicknamed at the red planet. What gives Mars its red appearance? A. the reflection of sunlight B. the iron on its surface C. the reflection of its moon’s light D. the copper on its surface 9. Which planet is very hot and rocky, with no moons, and has an atmosphere made of thick, poisonous gases? A. Earth B. Venus C. Mars D. Neptune 10. According to the chart below, how many total years will Mercury have had in the period of ONE year on Earth? A. 88 B. 2 C. 4 D. 365 Time for One Revolution Around the Sun Mercury = 88 Earth days Jupiter = 12 Earth years Earth = 365 days Neptune = 165 Earth years 11. Which defines the word planet? A. a large body that rotates around the sun B. a large body that is suitable for life C. a large body that contains water and land D. a large body that revolves around the sun 12. Mars and Earth have similar tilts. What other does this cause the two planets to have? A. temperatures B. seasons C. life-forms D. land forms Use the data chart provided to answer the following questions, #13-17 13. 14. Which planet has a longer day than its year? A. Mars B. Neptune C. Venus D. Earth In a 24 hour time period, how many days has Jupiter had? A. 2 days B. 1 day C. 4 days D. ½ a day 15. Using rounding or estimation, what is the size of Earth compared to Neptune? A. Earth is 4 times the size of Neptune. B. Neptune is 4 times the size of Earth. C. Earth is 2 times the size of Neptune. C. Neptune is 2 times the size of Earth. 16. How long does it take Mercury to revolve around the sun? A. 59 days B. 88 days C. 243 days D. 225 days Which planet takes the longest to rotate? A. Neptune B. Jupiter D. Venus 17. C. Mars 18. Which of the following statements is correct? A. The sun is not a planet. B. Earth is the center of our Solar System. C. The planets rotate in the same direction. D. The inner planets are made of gas. 19. Which planet resembles our moon Luna? A. Mars B. Saturn 20. C. Mercury How far away from the sun is Neptune? A. 5 million kilometers B. 5 billion kilometers C. 2 million kilometers D. 2 billion kilometer D. Neptune