Earth & Solar system

123456789
Across
  1. 1. The third planet from the Sun and the only known one to support life. (5 letters)
  2. 4. The four different weather periods in a year caused by Earth’s tilt and revolution. (7 letters)
  3. 5. An imaginary line that divides Earth into Northern and Southern Hemispheres. (7 letters)
  4. 7. The curved path followed by a planet or satellite around a star or planet. (5 letters)
  5. 8. The movement of a planet around the Sun in a fixed path. (10 letters)
  6. 9. Earth's natural satellite that reflects sunlight and affects tides. (4 letters)
Down
  1. 2. An imaginary line around which a planet rotates. (4 letters)
  2. 3. An object that orbits a planet; can be natural or man-made. (9 letters)
  3. 6. The spinning of a planet on its axis, causing day and night. (8 letters)