Uestion 40
which of the following describes the conditions of a perched water table?
a.
an aquifer below the regional water table is underlain by a horizontal aquitard
b.
an aquitard below the regional water table lies above a horizontal aquifer
c.
an aquifer above the regional water table is overlain by a horizontal aquitard
d.
a horizontal aquitard above the regional water table lies below an aquifer
1 points
question 41
which of the following is used in the prevention or slowing down of shoreline erosion?
a.
seawall
b.
groin
c.
beach nourishment
d.
all of these
1 points
question 42
the bending of waves so they become more parallel to the shoreline they are approaching is referred to as
a.
refraction
b.
oscillation
c.
translation
d.
reflection
1 points
question 43
which of the following describes when minerals in a metamorphic rock form distinct, parallel bands?
a.
marbleizing
b.
rock cleavage
c.
foliation
d.
stress streaking
1 points
question 44
where do you find the concentration of erosion in a meandering stream?
a.
at the unconsolidated point bars
b.
on the straight channel segments that connect the meander loops
c.
on the inner banks of the meander loops
d.
on the outer parts of the meander loops or bends
1 points
question 45
when meanders are entrenched it suggests which order of geologic events?
a.
a sea level rise was followed by stream downcutting.
b.
stream downcutting was followed by a rise in base level.
c.
land uplift was followed by stream downcutting.
d.
lateral cutting by streams was followed by subsidence of the land.
1 points
question 46
a lower stream/river base level would result from which of the following?
a.
sea level rises; land rises
b.
sea level drops; land subsides
c.
sea level falls; land rises
d.
sea level rises; land subsides
1 points
question 47
which of the following is a tidal current?
a.
spring tide
b.
ebb tide
c.
flood tide
d.
both flood and ebb tide
1 points
question 48
which is a good definition of a water gap?
a.
a short segment of canyon formed where a river flows across the outcrop area of a resistant, ridge-forming rock layer
b.
the narrow strip of land separating two meander loops
c.
a vertical-walled canyon resulting from very rapid stream downcutting
d.
a low sag between adjoining segments of a natural levee
1 points
question 49
which would be a definition of an aquifer?
a.
a layer or stratum in which groundwater flows downward to the water table
b.
an unsaturated, influent-flow bed or stratum below a spring
c.
a saturated, porous, and permeable layer or stratum
d.
the porous and permeable, saturated cone of depression in an aquitard
1 points
question 50
which one of the following is true concerning a major river system?
a.
upstream tributaries generally have higher competencies than the major river.
b.
discharge decreases below junctions with perennial tributaries.
c.
channel bed roughness and turbulence generally increase downstream.
d.
upstream tributaries generally have lower gradients than the major river.