Across
- 3. made from petroleum, roads surface
- 7. Milky Way is one of them
- 11. a big island next to Great Britain
- 14. the longest river on Earth
- 15. could be snowy, rock, muddy
- 17. the biggest ocean
- 18. the second biggest continent in the world
Down
- 1. cold area around the North Pole
- 2. bigger than a lake, smaller than an ocean
- 4. insular state of the USA
- 5. at the night sky
- 6. 21% of the atmosphere
- 8. city with Big Ben
- 9. covers over 70% of Earth surface
- 10. green area at the dessert
- 12. swift water
- 13. part of the USA at the farthest north
- 16. city of a country with a government headquarter