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