Across
- 2. silt.
- 3. Your body needs this inorder to survive.
- 4. the Earths groundwater.
- 8. Which water is alkaline or acidic.
- 9. Caused by the presence of suspended matter such as clay,
- 10. bacteria found in our environment, including the feces of
Down
- 1. Drainage area.
- 4. Rain or snow falls onto the Earth. Seeps into the ground to
- 5. Enters water ways from human and animal waste.
- 6. Occurs naturally in mineral depots, soil and seawater.
- 7. When much of the vegitation is replaced by
- 11. and other warm bodied animals.