Across
- 2. a system made up of an ecological community of living things interacting with their environment especially under natural conditions
- 4. the outer part of the solid earth consisting of the crust and part of the mantle
- 5. of or relating to space
- 6. when two people are talking
- 8. the surface waters of the earth and the water vapor in the atmosphere
- 11. somthing you use to find your way around places you don't know
- 12. the part of the world in which life can exist
Down
- 1. a place or region newly settled
- 3. this place or aerea is man made
- 7. the whole mass of air surrounding the earth
- 8. a home or place where an animal lives is called a
- 9. when a species is threatened with extinction
- 10. when a whole species is dead they are