FIRST CONTACTS 28000 BCE 1821 CE
SPANISH COLONIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rivers
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cliffs
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mountains
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plateaus
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Detailed explanation-1: -Rivers flow downhill toward their mouth. The mouth of the river is where the river enters a lake or ocean. Rivers have many small streams (tributaries) which join together to form a main channel. V-shaped valleys form in the upper course of a river where there is a lot of downwards erosion.
Detailed explanation-2: -River valleys, waterfalls, structural benches, river terraces, river meanders, ox-bow lakes and peneplains are some examples of erosional landforms formed by rivers.
Detailed explanation-3: -Valleys are defined as the low lying areas of land between hills or mountains, normally with a river or some sort of water course running through them. River valleys are commonly V-shaped, narrow and steeper near to the river’s source but become U-shaped, wide and flatter as the river works its way down to sea level.
Detailed explanation-4: -Answer: At the old stage of the river it is flowing on flat land. As a result it has to use most of its energy to flow instead of moving its load. More deposition starts to occur and common features begin to form such as ox bow lakes (diagram).