Watersheds Practice: Question Preview (ID: 18800)

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The Rolling Plains region of Texas has a number of deep canyons. One would expect this region to have -
a) moving glaciers
b) deep lakes
c) flowing rivers
d) high wind

A paper company wants to build a paper mill in the watershed where a village exists. In order to minimize potiential pollution to the village, which of the following locations is best to build the mill?
a) at the highest point in the watershed
b) downstream from the village
c) closest to a freshwater stream or river
d) nearest to the main street of the village

Rapid growth of algae in a pond is often the result of -
a) loss of habitat due to commercial building
b) flooding that causes water levels to rise
c) excess nutrients from fertilizer runoff
d) clogged river tributaries entering a lake

Which of the followin ghuman activities would most likely lead to subsidence, the sinking of the surface of the earth?
a) excess removal of water from underground reservoirs
b) using toxic chemicals in the manufacturing of goods
c) filtering out pollutants at a water treatment plant
d) storing drinking water in small above-ground basins

When runoff crosses the land, it picks up fertilizers that have been used on crops and lawns. These contaminants will eventually enter a lake, river or stream, which may lead to -
a) the earth's surface to sink
b) the water in an aquifer to drop
c) harmful rapid growth of algae
d) cleaner water for drinking and bathing

A neighborhood in a small Texas town had to be evacuated because the houses were sinking due to a problem in the aquifer. What is the most likely cause of this problem?
a) Heavy rains caused oversaturation of soil foundations
b) Overbuilding in the area polluted the ground water
c) Runoff from fertilized land created a dead zone
d) Excessive removal of water weakened the ground

When fertilizers enter surface water, they cause problems in the watershed by -
a) clogging narrow streams and preventing water from flowing properly.
b) increasing the amount of nutrients available to fish in lakes and streams.
c) causing rapid algal growth (algal bloom) that decrease oxygen levels and choke aquatic life.
d) raising the water level in nearby rivers to levels leading to flooding.

Fertilizers added to crops on farms can collect in runoff and enter the watershed. This problem would be reduced in areas where -
a) crops are grown for animals as well as humans
b) farms are situated on the sides of mountains
c) an extended drought leads to little or no rain
d) the growing season of the crops is longer

Which of the following correctly matches a catastrophic weather event with its effects on an ecosystem?
a) A flood can damage plants with high winds.
b) A hurricane can kill off plants in deep water.
c) A thunderstorm's lightning can start forest fires.
d) A tornado can move a lot of seawater onto land.

If a tornado uproots most of the trees in an ecosystem, it could be expected that due to the loss of trees, there will be a reduction in -
a) sunlight
b) oxygen
c) precipitation
d) soil

Tornadoes can negatively affect an ecosystem when -
a) the saltwater they bring kills off burrowing insects
b) their strong winds uproot many of the important plants
c) the rise in water level they produce introduces harmful salt
d) they bring higher temperatures favored by birds

Hurricanes can harm plants in coastal ecosystems in all of the following ways EXCEPT
a) high winds knocking down tall trees
b) soil washing away due to high water
c) clouds blocking the Sun for too long
d) storm surge moving saltwater onto land

From the distinct shapes of sand dunes and their features in a desert, a geologist could most likely determine which of the following?
a) direction of the prevailing (common) wind
b) daily high and low temperatures
c) amount of water nearby
d) age of the formations

The land area that supplies water to a river system is called a -
a) divide
b) watershed
c) stream
d) tributary

The amount of water a material can hold is known as -
a) porosity
b) permeability
c) impermeability
d) saturated

How easily water can flow through a material is know as -
a) porosity
b) permeability
c) impermeability
d) saturated

The boundary in the soil below which is completely saturated is called -
a) spring
b) flood
c) subsidence
d) water table

In order for a well to have water in it, the bottom needs to be below the -
a) water table
b) spring
c) impermeable
d) aquifer

The area of land where new water enters an aquifer is called the -
a) groundwater
b) watershed
c) recharge zone
d) permeable layer

Which of the following is likely to be the most permeable?
a) solid rock
b) sand
c) silt
d) clay

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