science word puzzle

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Across
  1. 2. the planet we live on
  2. 3. another word for fall
  3. 4. the season that starts on march 20
  4. 5. the affect of the earth revolving around the sun
  5. 8. the object that the earth revolves around
Down
  1. 1. when earth is facing opposite of the sun
  2. 2. when u have same amount of day and night hours
  3. 4. when earth is facing towards the sun
  4. 6. the longest day of the year
  5. 7. the thing that rotate around the earth