| A | B |
|---|
| 71% | the percentage of Earth covered in water |
| 97% | the percentage of Earth's water that is salt water |
| 3% | the percentage of Earth's water that is fresh water |
| 1% | the percentage of Earth's water that is available for human use |
| water vapor | the gaseous form of water |
| ground water | water that fills cracks and spaces in underground soil and rock layers |
| water cycle | continuous process by which water moves |
| sun | this powers the water cycle |
| evaporation | process by which water molecules absorb enough energy to change to gaseous state |
| transpiration | process of leaves giving off water |
| precipitation | water that falls back down to Earth as rain, snow, sleet, or hail |
| ocean | plays a major part in the water cycle since most precipitation falls here |
| irrigation | supplying water to land for crops |
| 2/3 | fraction of your body that is water |
| tributaries | smaller streams and rivers that feed into a main river |
| river system | a river and all its tributaries |
| watershed | land area that supplies water to a river system |
| divide | seperates watersheds, a streams on each side flow in different directions |
| flooding | occurs when the volume of water in a river increases so much that the river overflows its channel |
| speed and energy | a river gains this as it the its volume increases during a flood |
| levees | deposits vuilt up in long rideges, a natural or man-made defense against flooding |
| levees | a man made defense to flooding that can cause worse flooding downstream |
| ponds and lakes | these form when water collects in hollows and low lying areas of land |
| ponds | small body of water shallow enough for plant life on the bottom |
| lakes | these bodies of water form in many ways, for example, a river meander cutting off |
| reservoir | lake storing water for human use |
| lake turnover | refreshes lake nutrients seasonally |
| 90% | the percentage of an iceberg that is below the surface |
| pores | different sized spaces between rock particles |
| permeable | allows water to easily pass, examples of this kind of material are sand and gravel |
| impermeable | water cannot pass through easily, for example clay and granite |
| saturated zone | area of permeable rock or soild that is completelyaquifer filled with water |
| water table | top of the saturated zone that tells you how far to dig to reach water |
| unsaturated zone | rock above the water table that has some moisture, but is not completely full of water |
| aquifer | underground rock or sediment layer that holds water |
| springs | places where ground water bubbles out or flows out of cracks in rocks |
| wells | created when people drill below the water table to retrieve water |
| artisian well | a well in which water rises because of pressure |
| wetland | area of land that is covered with water during all or some of the year |
| marsh | a wetland area that is grassy with cattails, rushes, and tall grasslike plants |
| swamps | a wetland area that is much like a flooded forest with trees and shrubs |
| bog | a wetland area with acidic water that grows very mossy |
| mangrove forest | a wetland area found laong coast with fresh and salt water and trees with rough roots |
| shelter and nutrients | wetland habitats are good for wildlife because they provide this |
| filter | wetlands are important because they naturally do this to the water |
| floods | wetlands help to control these |
| Everglades | a unique wetland area with diverse wildlife and many endangered species, off the coast of Florida |
