Geoscience Crossword Puzzle by John Duvall 10/24/23

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Across
  1. 4. main constituent of gas giant planets
  2. 8. comet particles burn up as they enter earth's atmosphere
  3. 9. streak of light that burns in earth's atmosphere.
  4. 10. oval that is centered on two points
  5. 12. large planet composed mostly of helium or hydrogen
  6. 13. a line of cliffs produced by erosion or faulting.
  7. 14. object that orbits the sun, but isn't a satellite
  8. 16. interplanetary material that falls to earth.
  9. 18. space object that can form planets through collisions
Down
  1. 1. defines the shape of a planet's elliptical orbit.
  2. 2. average distance between the sun and earth
  3. 3. high, cool, light-colored clouds
  4. 5. small fragments that causes an impact crater on earth
  5. 6. a planet's apparent backward movement in the sky
  6. 7. earth-like planets made of rocks or metals with a hard surface
  7. 11. where small solar system bodies that are mostly rock and ice probably formed
  8. 15. have one or more tails that point away from the sun
  9. 17. low, warm, dark-colored clouds