Planet Earth

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Across
  1. 1. made up of icy dust particles and frozen gases, they look like bright balls with long, feathery tails
  2. 3. number of planets known to orbit the sun in our solar system
  3. 5. made up of the lithosphere, hydrosphere, and atmosphere, this is the part of the earth that all life exists
  4. 6. small round bodies that orbit the sun and are too small to be considered planets (2 words)
  5. 9. ocean containing the deepest known depression on earth
  6. 10. largest of the inner planets in the solar system
Down
  1. 2. number of continents on the earth
  2. 4. small, irregularly shaped, planet-like objects found mainly between Mars and Jupiter
  3. 7. continent where both the highest point on earth and the lowest land point on earth is found
  4. 8. gas that composes of 78 percent of the earth's atmosphere