The reasons for seasons

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Across
  1. 2. The part of earth that is south (below) of the equator.
  2. 5. The 24-hour period starts after midnight. 7 of them in one week.
  3. 7. The opposite of clockwise.
  4. 10. The Earth's main source of energy. The Earth revolves around it.
  5. 11. The path an object moves around another object.
  6. 14. Shown in scales, measuring hotness or coldness.
  7. 18. The rays of the sun going to the Earth are not horizontal lines, making _______.
  8. 19. The movement of Earth going around the sun counterclockwise.
  9. 20. 365 days in one ________.
Down
  1. 1. The part of Earth that is north (above) of the equator.
  2. 3. No sunlight all day. You can see stars all day.
  3. 4. An incorrect opinion or view based on an incorrect understanding.
  4. 6. An imaginary tilted line that the Earth rotates on.
  5. 8. The part of the day with very little sunlight. The moon and stars are visible at this time.
  6. 9. The planet we live on. It is extremely small compared to the sun.
  7. 12. The earth's circular motion on its axis.
  8. 13. An imaginary line going across the Earth. It is the warmest around this line.
  9. 15. An oval closely resembling a circle. The Earth's orbit is a _______.
  10. 16. When there is daylight all day, the sun does not set.
  11. 17. The rays shining on the Earth are horizontal, straight lines.