crossword

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Across
  1. 4. the atmosphere ____ us from dangerous radiations
  2. 5. it revolves around the sun
  3. 6. it revolves around the earth
  4. 7. it landed on moon on 21 july 1969
  5. 8. moon's ____ is rough and uneven
  6. 9. side of moon facing the sun is ____
  7. 11. when the sun, the earth and the moon are in a straight line
Down
  1. 1. earth is surrounded by a layer of_____
  2. 2. an object through which light can not pass
  3. 3. an object which revolves around a planet
  4. 10. earth's gravity is ____ times more than moon