Question 1 All the water in rivers and streams arrives directly from rainfall ru

Question

Question 1

All the water in rivers and streams arrives directly from rainfall runoff.

Question 2

In a region characterized by a parallel series of ridges and valleys, a _____ drainage network is expected.

Question 3

Which sediment load carries (electrically charged) ions?

Question 4

The slope of a stream surface measured between two points along its course is the _____.

Question 5

The inner edge of a meander, where sediment is deposited, is a(n) _____.

Question 6

All types of mass wasting have approximately the same velocity.

Question 7

_____ occur(s) where thawed sediments move downslope over permafrost.

Question 8

Tectonic activity generally destabilizes slopes.

Question 9

The flow of water from a spring on a hillside increases. Why does this make the hillside less stable?

Question 10

Which type of bedrock provides the greatest risk of a landslide?

Explanation / Answer

Q1) False

majority of the water flows in the river comes from the rain fall but its not completely, during the rain water perculate to the ground to form ground water, when the ground becomes saturated with the water, and the riverbank pass through this layer water start to flow to the river.

Q2)trellis

in the humid areas, lime stone which is more resistant form ridges and less resistant shale and limestone form valleys.

Q3)dissolved load

ions in the dissolved load are formed by the chemical weathering of rocks and they mixingup with the stream water and carries along with it.

Q4) gradient

gradient means the slope, higher the gradient steeper the stream surface/ a lineand a negative gradient shows that it slopes downward.

Q5) Point bar

point bars are mostly found in the meandering rivers and its a deposition made by alluvium in the inner edge of the meander stream.

Q6) False

when the water content in a slope region increases, frictional force between the beds reduces and the additional weight exerted by the water leads to the mass wasting, as the mass increases the velocity of the mass flow also increases. so velocity of mass flow differs depends on the mass.

Q7)solifluction.

it is the flow of water saturated soil over the permafrost, permafrost is impermeable to water, so when the soil saturated with water due to the lack of friction and influence of gravity it start to flow.

Q8) True

tectonic activity causes movements in faults and changes in earths surface which leads to land slides and erosion, and the stability of the slopes reduces.

Q9)the increased spring flow will saturate more of the hill side and thereby increase its instability.

when the soil saturated with water, its stability reduces, it start to flow under the influence of gravity.

Q10)shale

shale consist of fine grained sedementary rocks consist of clay and silt particles, so they provide very less frictional support to the upper beds and when the upper layer saturated with water it becomes unstable over this layers.

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