Earth and Space Systems Test Review

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Across
  1. 2. A planet with similar size and mass to Earth.
  2. 4. Created geocentric model of solar system
  3. 5. Between Mars and Jupiter is an ____ belt.
  4. 6. Planet closest to the sun.
  5. 8. When the moon appears to be getting larger
  6. 10. have.
  7. 12. Oxygen and ____ mostly make up Earth's atmosphere
  8. 13. A meteroid that has hit Earth's surface
  9. 14. Supported geocentric model of solar system
  10. 19. Earth spinning on its axis
  11. 20. Largest Planet
  12. 21. Which object's gravity affects tides the most?
  13. 22. Planet that rotates completely on its side
  14. 25. Sun-centered model of the solar system.
Down
  1. 1. First country to orbit human around the Earth
  2. 3. One complete trip of Earth around the sun.
  3. 7. Force that holds all planets in orbiting position around the sun.
  4. 9. Earth centered model of the solar system.
  5. 11. Created heliocentric model of solar system
  6. 15. When the moon appears to be getting smaller
  7. 16. Supported heliocentric model of solar system
  8. 17. Number of moons Earth, Jupiter, Uranus and
  9. 18. Planet with lowest density and large number of rings.
  10. 21. Smallest planet
  11. 23. Earth is a ____ planet (terrestrial)
  12. 24. Could not clear its neighborhood and became a dwarf planet.