Across
- 5. Underground layers of permeable rock
- 7. the introduction of substances or energy.
- 8. The vast, continuous bodies of saltwater.
Down
- 1. Vital freshwater systems that flow from higher ground
- 2. Freshwater stored in underground aquifers
- 3. large inland bodies of standing water.
- 4. A liquid
- 6. The process of making something dirty.