Across
- 4. Wide, flat, border area around rivers and streams onto which water spills out
- 6. A widely spread source of pollution such as a road runoff or parking lot which is difficult to link to a specific origin.
- 7. Examples would include Delta, Alluvial Fan, Beach Sand Dunes.
- 8. The measure of how acidic or alkaline the water in an aquatic system is.
- 10. A large natural or artificial lake often used as a source of water supply
- 11. A smaller stream that feeds into a river and eventually into a river system
- 13. Allowing (especially liquids) to pass or diffuse through
- 14. The interaction of all the living and nonliving things in an area
- 17. The amount of undissolved particles in the water; how cloudy the water is
- 19. The rapid growth of a population of algae due to excess fertilizers or other substances that feed the algae getting into the water
- 21. all the nonliving parts of an ecosystem
- 22. depletion of the water table due to lack of precipitation
- 24. The area of land where all water that is under it or drains off of it goes into a common water body, like a storm drain, a creek, or Pflugerville Lake, or into a river system which includes everything from the beginning of the first tributary to lake or ocean it empties into.
- 25. The draining away of water from the surface of an area of land, building, structure, etc.
- 26. a ridge or an area of higher ground that separates one watershed from another.
- 28. The amount of salt dissolved in the water
- 31. microscopic bubbles of gaseous oxygen that are mixed in water and available to aquatic organisms for respiration; how much oxygen is in water
- 35. When limestone reacts with acid in water, the limestone is dissolved away leaving an open space called _______.
- 37. Type of water found in Lakes Ponds Rivers Streams
- 38. water that is found in spaces between rock particles below the Earth's surface
- 40. evaporation condensation. precipitation. Collection
Down
- 1. A mound or ridge of unsorted sediment deposited by a glacier
- 2. Pollution that comes from a specific person, business or site. It is directly identifiable from where it has come, such as a discharge pipe at a plant that treats sewage.
- 3. Percentage of the Earth's water that can be classified as freshwater
- 5. Laying down of sediment carried by wind, water, or ice
- 9. Water above ground, above the surface of earth
- 12. Examples would include-Chemical- lichens, acid rain Mechanical - Frost wedging, Abrasion (wind blowing sand against a rock cliff)
- 15. The process by which water, ice, wind, or gravity moves weathered particles of rock and soil.
- 16. the build up of a substance (usually a toxin) as it passes through a food chain
- 18. all the living things in an ecosystem
- 20. Chemical, physical, biological characteristics of water; the degree of purity in the water
- 23. Acid in rainwater reacts with limestone and breaks it down. This is an example of________ _____________.
- 27. The partially enclosed area where freshwater mixes with saltwater
- 29. Loss of plant cover can lead to erosion by “__________________&____________________”.
- 30. Valley formed by the erosive forces of a glacier are this shape
- 32. This word means “Full of tiny holes” or spaces; easily penetrated by gas or liquid
- 33. A lichen growing on rock and breaking it down is an example of _____________ weathering
- 34. The breakdown of rock due to rain, wind, ice, sunlight, and plants.
- 36. Species-rich ecosystems in land that is soaked with water for at least part of the year
- 39. Sand ________ form from wind erosion and deposition