chapter 21 crossword puzzle lesson 1-3

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Across
  1. 4. the moons of jupiter
  2. 7. what determines 1 year
  3. 9. what is far to great to measure anything on earth
  4. 10. what traps energy and makes planets hotter
Down
  1. 1. what determines 1 day
  2. 2. what are planets closer to the sun called
  3. 3. what is a glowing streak of light that passes earth
  4. 5. what is a small rock that moves through space
  5. 6. what are gas,ice,and dusty objects that orbit the sun
  6. 8. what are small rocky objects that are near jupiter and mars