Rocky Planets
  • 1. Our solar system is made up of mostly _____ _____.
A) planets
B) asteroids
C) comets
D) empty space
  • 2. Which of these is NOT part of our solar system?
A) undiscovered planets
B) gas giant planets
C) rocky planets
D) watery planets
  • 3. How many categories of planets are there?
A) 2
B) 8
C) 3
D) 4
  • 4. These planets are all part of the _____ category: Mercury, Venus, Earth, and Mars.
A) Rocky
B) Watery
C) Undiscovered
D) Gas Giant
  • 5. Which planet is closest to the sun?
A) Venus
B) Mars
C) Earth
D) Mercury
  • 6. How many days does it take to revolve around the sun?
A) 50
B) 365
C) 58
D) 88
  • 7. Which planet has the greatest temperature difference from daytime to nighttime?
A) Venus
B) Mars
C) Earth
D) Mercury
  • 8. Which planet is very similar to Earth?
A) Earth
B) Mercury
C) Mars
D) Venus
  • 9. Venus rotates in the ________ direction as Earth.
A) alike
B) fast
C) opposite
D) same
  • 10. The surface of Venus has ______ ______.
A) smooth ridges
B) lakes and rivers
C) tall, sharp cliffs
D) volcanic ridges
  • 11. Which planet is third from the sun?
A) Mercury
B) Mars
C) Venus
D) Earth
  • 12. Earth is the only planet known to have ______.
A) cliffs
B) life
C) sunlight
D) volcanoes
  • 13. Because Earth has so much water it is known as the ____ planet.
A) green
B) blue
C) watery
D) smallest
  • 14. Tectonic activity is the Earth's ______.
A) temperature always changing
B) water always evaporating
C) plates constantly in motion
D) trees constantly changing color
  • 15. Earth revolves around the sun in _____.
A) 365 1/4 days
B) 24 hours
C) half a day
D) 6 months
  • 16. The Earth's _____ causes changes in seasons.
A) water cycle
B) tectonic activity
C) rotation
D) tilt
  • 17. What planet is known as the red planet?
A) Venus
B) Mercury
C) Mars
D) Earth
  • 18. How many moons does Mars have?
A) 8
B) 3
C) 2
D) 4
  • 19. What does the wind on Mars cause?
A) seasons
B) dust storms
C) rocks
D) hurricanes
  • 20. Even though no water has been found on Mars, scientists have discovered _____.
A) ice caps at the poles
B) constant wind
C) iron
D) polar bears and penguins
  • 21. What is the difference between the two hemispheres on Mars?
A) one has life; one does not have life
B) one rotates faster than the other
C) one is a flat, plains area; one has craters and highlands
D) one gets rain; one does not get rain
  • 22. Mars' rate of rotation is _____ Earth's.
A) colder than
B) similar to
C) opposite of
D) warmer than
  • 23. Our group of rocky planets are ______.
A) moving away from the sun.
B) moving closer to the sun.
C) closest to the sun.
D) the farthest from the sun
  • 24. The fastest orbiting planet is _____.
A) Mars
B) Mercury
C) Venus
D) Earth
  • 25. Which planet do we live on?
A) Mars
B) Venus
C) Earth
D) Mercury
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