Across
- 4. (two words) Water that is relatively pure and contains few dissolved salts.
- 6. (three words) A surface mining technique that involves digging a large pit in the ground to remove minerals near the surface.
- 7. Fresh water stored beneath Earth’s surface in rock or soil.
- 10. (two words) A mining method in which the tops of mountains are removed to expose coal seams underneath.
- 11. (two words) The upper level of the zone of saturation in an aquifer.
- 13. Describes material through which water can pass.
- 14. An artificial lake created behind a dam for water storage.
- 16. (two words) A mining method in which material in riverbeds or streambeds is sifted to extract deposited resources.
- 18. An underground layer of permeable rock or sediment that stores and transmits groundwater.
- 19. A mineral or group of minerals that is mined so that a metal or metals can be removed from it.
Down
- 1. A process in which ores are heated to separate metals from other elements.
- 2. The process of removing salt from saltwater to produce fresh water.
- 3. (three words) Pollution that comes from a single, identifiable source.
- 5. (three words) Pollution that comes from many diffuse sources spread over a wide area.
- 8. (two words) The continuous series of processes that cause rock to change from one type to another, including igneous, sedimentary, and metamorphic stages.
- 9. (two words) An area where water from Earth’s surface enters an aquifer.
- 12. (two words) A mining method in which soil and rock are stripped away to expose mineral deposits close to Earth’s surface.
- 14. Water that flows over land into bodies of surface water after precipitation.
- 15. A structure built across a river to control the flow of water.
- 17. The land area that supplies water to a river system.