Planet Earth

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Across
  1. 1. The bright star at the centre of our Solar System. (3)
  2. 4. Earth moves around the Sun in an ______. (5)
  3. 5. The solid part of Earth's surface. (4)
  4. 9. Earth spins on an imaginary line called its ______. (4)
  5. 10. Earth is covered by land and ______. (5)
Down
  1. 2. Rotation causes day and ______. (5)
  2. 3. The natural satellite of Earth. (4)
  3. 6. The gas mixture surrounding Earth. (3)
  4. 7. The period when the Sun is visible. (3)
  5. 8. The planet we live on. (5)