Geol 101 practice

A stream's base level is:

The same as the longitudal profile

The lowest level to which a stream can erode

The same level as the flood level

The amount of material the stream is capable of transporting

A river widens it's valley is by:

Vertical erosion

Headward erosion

Lateral erosion

Deposition that produces deltas at the mouth

A river deepens it's valley by:

Vertical erosion

Headward erosion

Lateral erosion

Depositions that produce deltas at the mouth

Which of the following represents the velocity of a river's water?

V=(width)*(depth)*(discharge)

V= Discharge/(width*depth)

V=(width*depth)/discharge

V=(discharge)*(width)*(depth)

Select all properties from the list that increase as you move downstream in a river

Gradient

Discharge

Velocity

Channel roughness

Select all properties that descrease as you move downstream in a river

Gradient

Discharge

Velocity

Channel roughness

A waterfall flowing down and into a canyon is:

Lengthening its channel by deposition at the mouth

Lengthening its channel by headward erosion

Deepening channel by headward erosion

Widening its channel by lateral erosion

Which side of the curve is transportation? And which is settling?

Transportation is above

Transportation is below

Settling is above

Settling is below

Braided streams occur

On the inside of the meander bend in a stream channel

Downstream from a dam that is placed on a graded stream

When narrow canyons discharge into broad, arid valley floors

When the sediment load of a stream exceeds the capacity

Alluvial fan deposits occur

On the inside of the meander bend in a stream channel

Downstream from a dam that is placed on a graded stream

When narrow canyons discharge into broad, arid valley floors

When the sediment load of a stream exceeds the capacity

Which of the following statements accurately describes what a 100-year flood is?

A 100-year flood occurs once every 100 years

A flood that has a 1% chance of occurring every year

The biggest flood that has occurred in the last 100 years

A flood that is 100 times the stream's normal discharge

Flood Control: Which of the following are the most recent (most modern) adopted techniques to limit flooding (select all that apply)

Earth mounds (levees) built on river banks to increase the capacity of the channel

Altering a stream channel (straightening) to make flow more efficient - Increases erosion

Dams built to store floodwater and release it slowly

Limit development within the floodplains

The body of ice covering Greenland is called a(n):

Ice cap

Ice sheet

Ice shelf

Valley glacier

Ice is truly glacial when:

Ice simply remains frozen over an extended period of time

Firn ice is remelted and refrozen many times over an extended period of time

Firn ice is buried and metamorphically recrystallized

None of these

The general term for material deposited by a glacier is:

Till

Piedmont

Drift

Erratic

Geol 101 practice

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