What is ox-bow lake? Draw diagram to show how it is formed.
0. What is floodplain? Write how it is formed.
1. Write how and where sandbars are formed in a river channel,
2. How are the deltas formed?
3.
Write why the wind action is strong in the deserts.
4. What is meant by deflation?
Answers
Answer:
1)An oxbow lake is a U-shaped lake that forms when a wide meander of a river is cut off, creating a free-standing body of water. This landform is so named for its distinctive curved shape, which resembles the bow pin of an oxbow. In Australia, an oxbow lake is called a billabong, from the indigenous Wiradjuri language..
2)Floodplains are formed when a meander erodes sideways as it travels downstream. When a river breaks its banks, it leaves behind layers of (silt). These gradually build up to create the floor of the plain. Floodplains generally contain unconsolidated sediments, often extending below the bed of the stream.
3)The action of wind erosion is more prominent in deserts because there is little vegetation cover and the soil cover is loose. As such, sediments get easily carried and deposited by winds. Besides, absence of other agents of erosion like water and ice makes wind the most prominentweathering agent in the deserts.
4)Definition: When the overall price level decreases so that inflation rate becomes negative, it is called deflation. It is the opposite of the often-encountered inflation. Description: A reduction in money supply or credit availability is the reason for deflation in most cases.
Answer:
1. An oxbow lake is a U-shaped lake that forms when a wide meander of a river is cut off, creating a free-standing body of water. This landform is so named for its distinctive curved shape, which resembles the bow pin of an oxbow.
2. Floodplains are formed when a meander erodes sideways as it travels downstream. When a river breaks its banks, it leaves behind layers of (silt). These gradually build up to create the floor of the plain. Floodplains generally contain unconsolidated sediments, often extending below the bed of the stream.
3. River deltas form when a river carrying sediment reaches either (1) a body of water, such as a lake, ocean, or reservoir, (2) another river that cannot remove the sediment quickly enough to stop delta formation, or (3) an inland region where the water spreads out and deposits sediments.