Across
- 4. el _____ southern oscillation
- 6. "originating from human activity"
- 8. fetal birth
- 10. the _________ cycle is the only with no involvement from the atmosphere
- 13. ______capacity
- 17. whitening of corals
- 18. tropical grassland
- 20. the ground in which plants grow
- 21. egg-laying mammal
Down
- 1. weathering with movement
- 2. thorough nourishment of offspring
- 3. _______ cells
- 5. the shapes an environment can take
- 6. body of groundwater
- 7. natural drainage system
- 9. _______ change
- 10. number of individuals in an area
- 11. cover 75% of the earth's surface
- 12. _____ winds
- 14. watershed product
- 15. dynamic species
- 16. second highest taxonomic rank
- 19. a combination of silt, sand, and clay