Across
- 3. ecological community including plants and animals
- 6. transportation, communication networks,sewage
- 8. movement of weathered material by wind or water
- 9. killing group of people from a nation or ethnicity
Down
- 1. liquid or frozen water that falls to the earth
- 2. winds that blow in the summer carrying moist air tornadoes violently rotating columns of air
- 4. spread of people, things, ideas, diseases desalinization the process of removing salt from seawater
- 5. cause high winds and large amounts of rainfall
- 7. periodic warm ocean currents of the Pacific waters