ch14

What is the probability of a 4-year flood happening every year?

25%

Which of the following is true about the headwaters of a stream system? Straight Channels High competence Not so many tributaries Discharge is low Steep gradient

Straight Channels High competence Discharge is low Steep gradient

Which of the following is not a cause of turbulence in water?

a large suspended load

The process of sandblasting, grinding, or scraping of rock by other moving rock fragments (such as in water) is referred to as ____________ .

abrasion

A(n) __________ is a slightly elevated area on only one side or in the middle of a stream where sediments have been deposited and accumulated due to changes in the flow of the stream.

bar

Which sediment is moved along the bottom of a stream by bouncing and rolling?

bed load

Which of the following formations tends to occur where a river or stream opens up into a larger body of water such as an ocean and deposits a lot of sediment?

deltas

Which drainage pattern best describes the pattern seen in the picture below?

dentritic

Select ALL of the following which would cause an increase in a streams discharge. changes in stream-flow velocity does not change discharge decrease in stream-flow velocity increase in stream-flow velocity increase in cross-sectional area decrease in cross-sectional area changes in cross-sectional area does not change discharge

increase in stream-flow velocity increase in cross-sectional area

Where along a meandering stream is weathering and erosion greatest?

outside of a bend

Which statement below most accurately describes the primary cause of floods?

precipitation is greater than infiltration

Which aspect of the water cycle deals with water flowing downhill at Earth's surface?

runoff

Which of the following does NOT occur as you move from the headwaters to downstream along the longitudinal profile of a body of water?

sediment sized deposited increase

Small streams which gather to form a larger stream which are found in the headwaters of a water drainage network are called ___________ .

tributaries

Which term is best to describe the type of drainage pattern seen in the drawing below?

Trellis