Reasons for the Seasons

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Across
  1. 2. 24 hours beginning at midnight
  2. 4. The half of the Earth that is North
  3. 9. Each of the twelve named periods into which a year is divided
  4. 11. The place we live on
  5. 13. The angle a planet's rotation axis makes with the plane of its orbit.
  6. 14. The Half of the Earth that is South
  7. 16. The sunlight's position during the winter months
  8. 17. The thing the Earth revolves around
Down
  1. 1. The polar star or North Star, in the constellation Ursa Minor.
  2. 2. Sunlight in which the path of light from the sun to the plant is a straight line.
  3. 3. A whole 365 days.
  4. 5. The brightest star in the constellation Ursa Minor
  5. 6. Northern end of the Earth.
  6. 7. The curved path through which objects in space move around a planet or star.
  7. 8. The motion around another object.
  8. 10. The measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius
  9. 12. The sunlight's positions during the summer months
  10. 15. Occurs when something in the path of light from the sun diffuses