1- Changes along a river can be determine by examining its___________, which is

Question

1- Changes along a river can be determine by examining its___________, which is simply a cross-sectional view of a stream from its surface area to where it simplifies into another

A- Longitudinal profile

B- Latitudinal profile

C- Length profile

D- Lateral profile

2- The steepest angle at which material remains stable is called the ______________

A- Angle of rest

B- Angle of repose

C- Angle of relaxation

D- All of the above

3- Permeability is ________________.

A- The amount of empty space in a material, as a percentage of the total volume

B- A measurement of the size of pore spaces

C- A measurement of the shape of pore spaces

D- A measurement which describes the ability for water to flow through subsurface material

4- What is the difference between a rockslide and debris flow?

A- A rockslide is a slow form of mass wasting and debris flow is a rapid form

B- A rockslide is a fast form of mass wasting and debris flow is a slow form

C- No difference, both are slow forms of mass wasting

D- No difference, both are fast forms of mass wasting

5- The zone of sediment deposition, where sediment accumulate, is located within region of the river system?

A- The headwaters

B- The trunk streams

C- The deltas

D- The drainage basins

6- The most common method for removing groundwater is to pump from a _____.

A- Well

B- Aquitard

C- Hydraulic gradient

D- Artesian systems

7- The measure of a stream’s ability to transport particles based on size (rather than quantity) is called the _______.

A- Setting velocity

B- Competence

C- Capacity

D- Base level

7- Caverns, sinkholes, and tower karst are evidence that groundwater ___________.

A- Dissolves rock

B- Deposits sediment within the upper crust

C- Is part of the hydrological cycle

D- None of the above

8- A stream’s base level is the _____________.

A- Elevation of the channel bend

B- Slope of a channel that has achieved a zone gradient

C- Lowest elevation to which a stream can erode

D- Elevation of the base of the floodplain

9- A typical longitudinal profile shows that near the headwaters, a river tends to have a ______ gradient, whereas near the mouth the gradient is ________.

A- Gentler, steeper

B- Steeper, gentler

C- Concave, convex

D- Convex, concave

10- What is the difference between a debris flow and creep?

A- Debris flow is a slow form of mass wasting and creep is a rapid form

B- Debris flow is a fast form of mass wasting and creep is a slow form

C- No difference, both are slow forms of mass wasting

D- No difference, both are fast forms of mass wasting

11- List the following groundwater features in the correct order from the surface down

A- Water table, saturated zone, unsaturated zone

B- Saturated zone, water table, unsaturated zone

C- Unsaturated zone, water table, saturated zone

D- Water table, unsaturated zone, saturated zone

Explanation / Answer

1) A- Longitudinal profile. The longitudinal profile of a river is concave with a steep upper portion near the source, and the velocity of the river is gradually decrease when the mouth is approached. The longitudinal profile characterizes average stream slopes and depths of riffles.

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