Across
- 4. permintly frosen ground.
- 7. a piece of land completely surrounded by water.
- 8. a person who moves to a different county that you were not born in.
- 10. variety of species in an ecosystem.
- 12. a man-made water route.
- 13. lines that run North and South/up and down.
- 15. no longer living.
- 17. a wall to separate East Berlin from West berlin.
- 18. a 40-year war.
- 19. referencing to a city or town.
Down
- 1. cleaning of trees in a large area.
- 2. 71% of the world.
- 3. fine particles of soil.
- 5. flat area of land located next to a river or stream that floods
- 6. area where volcanos and earthquakes are frequent.
- 9. protection of the environment.
- 11. non-native animals and plants that disturb habitats.
- 13. completely surrounded by land.
- 14. the percent of people who can read and write in a certain area.
- 16. height above the ocean.
- 17. boundary of a country, city, or state.