Wetlands help reduce erosion through _______.
a.
nutrient absorption
b.
sediment trapping
c.
bacterial absorption
d.
all of the above
b.
sediment trapping
Australian aborigines could not use wells in the desert due to lack of groundwater.
FALSE
Insects are most likely found in which aquatic zone?
a.
pelagic
b.
littoral
c.
benthic
d.
all of the above
b.
littoral
Groundwater overdraft occurs when _______.
a.
the location of the water table changes due to season
b.
aquifers become polluted
c.
the rate of use exceeds the rate of replenishment
d.
trees are planted
c.
the rate of use exceeds the rate of replenishment
The 3 stages of the water cycle are
a.
evaporation
c.
condensation
b.
precipitation
d.
all of the above
d.
all of the above
Which of the following is a limiting factor in lotic ecosystems?
a.
pH
b.
salinity
c.
light intensity
d.
all of the above
d.
all of the above
The abundance and variety of foods available in wetlands is a large contributor to their biodiversity.
TRUE
Where is light penetration in a river or stream likely to be lowest?
a.
the source
b.
the mouth
c.
the middle portion
d.
none of the above
b.
the mouth
Which of the following is least likely to have difficulties with economic access to potable water?
a.
Zimbabwe
b.
Australia
c.
India
d.
None of the above
b.
Australia
The defining characteristic of potable water is that it _______.
a.
is used as tap water
b.
can be used for washing and irrigation
c.
can be used and consumed without risk
d.
is delivered through pipes
c.
can be used and consumed without risk
A heat source could be considered a source of pollution.
TRUE
which of the following statements about the effects of pollution on marine ecosystems is true?
a.
Burning fossil fuels causes a direct increase in the temperatures of ocean water.
b.
Burning fossil fuels causes a decrease in the pH of ocean water making i
b.
Burning fossil fuels causes a decrease in the pH of ocean water making it more acidic.
Littoral zones are more likely to contain vegetation than riparian zones.
FALSE
Which of the following is not an effect of erosion on lakes?
a.
water leakage
b.
wearing away of sides
c.
increased water levels
d.
basin filling with sediment
c.
increased water levels
Which of the following is the most serious effect of water pollution for humans?
a.
infectious diseases
b.
algal blooms
c.
toxic food chain effects
d.
low-oxygen water
a.
infectious diseases