Chapter 28 + 29 Crossword Addison Kiefer

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Across
  1. 2. how many inner planets
  2. 4. volcanically active and is a very harsh place.
  3. 6. third planet from the Sun
  4. 7. Sun centered solar system
  5. 9. thin atmosphere—95% carbon dioxide and 0.15% oxygen.
  6. 10. closest planet to sun
Down
  1. 1. Earth-centered solar system
  2. 3. nearest star to earth
  3. 5. is a Hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity.
  4. 8. the Sun and planets formed together from a cloud of gas and dust nebula