Across
- 3. making an area more urban
- 8. clearing a wide area of trees
- 9. the total quantity/weight of organisms in a given area or volume
- 10. process that plants do
- 12. violent shaking of the ground
- 13. state of the atmosphere
- 14. chemical element #7
Down
- 1. radiation emitted by the sun
- 2. chemical element #6
- 4. animals or plants from another region of the world that don't belong in their new environment
- 5. series of processes that create and transform the rocks in Earth's crust
- 6. a species in which other species depend on in an ecosystem
- 7. process that soil goes through because of natural agents
- 11. energy emitted by the sun