Rivers

• What is the beginning or the start of a river?


  Source
• What is the route a river takes to the sea?


  Course
• What is the point at which 2 rivers or streams join together?


  Confluence
• What is a stream or smaller river that flows into a larger stream or river?

  Tributary
• What is the point where a river comes to the end, usually when entering the sea?


  Mouth
• What is the area of land drained by a river?

  Drainage basin
• What is the area of high ground which separates 2 drainage basins?


  Watershed
• What is the part of a river mouth that is tidal?

  Estuary
• That are the stages of a river?


  Youth, mature, old age.
• What land-forms can be found in the youthful stage?


  V-shaped valleys, interlocking spurs and waterfalls
• What land-forms can be found in the mature stage?


  Meanders and oxbow lakes.
• What land-forms can be found in the old stage?


  Flood plains and levees
• That are the different processes of river erosion?


  Hydraulic action, abrasion, attrition, and solution.
• What is Hydraulic action?


  The physical force of moving water waves away and breaks of the rock and soil from the banks and bed of the river.
• What is Abrasion?


  Abrasion is the process of wearing away or scraping of a material by friction.
• What is Attrition?


  Small stones in the river are worn down and broke up as they hit off each other.
• What is Solution?


  Rocks, such as limestone, and soil are dissolved by acids in the water.
• What are the processes of river transportation?


  Rolling, bouncing, suspension an solution.
• What is Rolling?


  The process of continuously rotating an object. This is known as traction.
• What is Bouncing?


  Small pebbled are bouncing along the bed of the river. this process is known as saltation.
• What is Suspension?


  Light material such as sand and silt float along in the water.
• What is Solution?


  Other materials dissolve in the water and are carried along by the water.
• What happened when the oxbow is cut off the main river?


  The lake will dry up and form a oxbow scar.
• What is the Alluvium?


  Material transported and deposited by a river when it foods.
• What is the fan-shape area at the mouth of the river? 


  Delta
• What are the positive of rivers?


  Water supply, transportation, fishing and tourism
• What are the negatives of rivers?


  Floods and pollution.
• What are the different patterns of drainage?


  Dendritic, trellis, radial, deranged.
• What is the most common form of drainage system?


  Dendritic
• What are small streams at 90 degrees drainage called?


  Trellis.
• What is a stream that resembles the spokes on a bicycle wheel?


  Radial
• What is drainage with no clear pattern?


  Dendritic