Our Earth

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Across
  1. 4. An invisible line that divides the Earth into North and South Hemispheres
  2. 5. Layer of gas that surrounds a planet
  3. 7. The invisible line around which Earth rotates
  4. 8. Earth's period of rotation
Down
  1. 1. Covers 70% of the Earth's surface
  2. 2. Earth's natural satellite
  3. 3. The force that attracts a body towards the centre of the Earth
  4. 6. The path a planet takes around a star