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Hydrosphere Review
structure of the hydrosphere review
Question | Answer |
---|---|
What percent of the earths water is the ocean | 96.5 |
what percent of the earths water is fresh water | 3.5 |
what is the fresh water distribution of ice | 1.762 |
what is the fresh water distribution of groundwater | 1.7 |
what is the fresh water distribution of surface fresh water | 0.014 |
what is the fresh water distribution of atmosphere and soil | 0.002 |
what bodies of water hold the largest amount of water | oceans |
what are oceans | largest bodies of water on earth only containing salt water |
what features house water a ice | icebergs, glaciers, polar ice-caps, and permanent snow |
where are polar ice-caps located | in the artic and antartic circles |
what is the difference between a watershed and a river basin | both terms describe land that drains into a river, stream, or lake |
what is a river basin | area that drains into a large river |
what is a watershed | area that drains into a small river or stream |
what are large river basins made up of | many interconnected watersheds |
what north carolina basins are made of many small watersheds | cape fear and nuese river |
what is the lowest point that water in a watershed runs to | river, stream, lake or ocean |
what is a river | a large channel in which water ic continually flowing down a slope, made of many streams that come together |
what is a stream | a small channel along which water is continually flowing down a slope, made of small gullies |
what is a lake | a body of water of considerable size contained on a body of land |
what is groundwater | water found in cracks and pores in sand, gravel, and rocks below the earths surface |
what is an aquifer | a pourous rock layer underground that is a reservoir for water |
what is a wetland | area where a water table is at near or above the land surface long enough during the year to support adapted plant growth |
what are the types of wetlands | swamp, bogs, marshes |
what is a swamp | wetland dominated by trees |
what is a bog | dominated by peat moss |
what is a marsh | wetland dominated by grasses |
what is erosion | the process by which soil and sediment are transported from one location to another. |
what is the water cycle | continuous movement of earths water from the ocean to the atmosphere to the land and back to the ocean. |
what is runoff | precipitation that flows over land into streams and rivers. this water later enters oceans |
what is evaporation | water from the oceans and the earths surface changes into water vapor |
what is condensation | when water vapor cools and changes into water droplets that form clouds in the atmosphere |
what is precipitation | rain, snow, sleet, or hail that falls from clouds onto the earths land and oceans |
what is percolation | the downward movement of water through pores and other spaces in soil due to gravity |
what is a river system | network of streams and rivers that drains an area of its runoff |
what is a watershed | river systems divided into regions, area of land that is drained by a water system |
3 factors that influence a streams ability to erode | gradient, discharge, and load |
what is gradient | measure of change in elevation over a certain distance. a high gradient gives a stream or river more energy to erode rock and soil |
what is discharge | amount of water that a stream or river carries in a given amount of time. as discharge increases erosive energy and speed also increase |
what is load | materials carried by a stream, the size of a streams load effects its rate of erosion |
what does a youthful river do? | erode channels that are deeper rather than wider |