Sun & Season Crossword Challenge

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Across
  1. 3. / The third planet from the Sun.
  2. 4. / When the Sun is at its greatest distance from the equator.
  3. 5. / The source of light and energy for Earth
  4. 6. / Caused by Earth's tilt and orbit
Down
  1. 1. / Spinning of Earth on its axis.
  2. 2. / Earth’s yearly orbit around the Sun.
  3. 7. / When day and night are equal in length.
  4. 8. / Varies with the season and affects temperature