WorksheetsHydrosphere - Freshwater Unit
Total questions: 20
Worksheet time: 3600secs
Which causes a decrease in the amount of DO in a lake?
Lower temperatures
fertilizer runoff
overfishing
The release of moisture by living plants.
evaporation
precipitation
condensation
transpiration
A stream that runs into a river is known as a
Porosity
Tributary
Stream Run
Runoff
Which environmental factors would most likely impact the quality of a freshwater system?
dissolved oxygen and pH
salinity and temperature
surface tension and aquatic organisms
Which is Earth's largest source of drinking water
lakes
rivers
oceans
aquifers
Which is used by sewage treatment plants to kill harmful bacteria in water?
filters
chlorine
detergents
coagulants
Which best describes the amount of frozen water on Earth?
about 2% of Earth's water is frozen
about 3% of Earth's water is frozen
exactly 0.9% of Earth's water is frozen
Which type of precipitation most often soaks the ground and refills groundwater?
a violent hail storm
a heavy morning fog
a gentle, long lasting rain
a sudden, fast moving thunderstorm
Which type of reservoir could always provide fresh water?
inland lakes
river deltas
mountain glaciers
tropical seas
Where does all water on Earth eventually flow?
oceans
ponds
rivers
ice
Where is the majority of Earth's freshwater located?
groundwater
oceans
lakes
ice
Which of these materials would make the most effective aquifer?
a material that has high porosity and high permeability
a material that has high porosity and low permeability
a material that has low porosity and low permeability
a material that has low porosity and high permeability
Why do biologists use indicator species?
to compare freshwater and ocean ecosystems
to count the number of organisms present
to monitor water quality and biodiversity
to analyze the dominant species
In which way does a flood have the greatest impact on local water quality?
It causes aquifers to run out of water.
It cleans the water and decreases the turbidity.
It allows many foreign materials to enter the water.
It moves animals to new locations and increases biological diversity.
Which nonpoint pollutants are most directly linked to agriculture?
oil spills and motor oil
road salt and pet waste
acid rain and lawn runoff
bacteria and excess nutrients
Which chemical elements in fertilizers pollute stormwater and contribute to excessive plant growth in a water system?
iron and lead
copper and zinc
calcium and magnesium
nitrogen and phosphorous
Which process would most likely increase the dissolved oxygen level in a freshwater lake?
algae bloom
lake turnover
photosynthesis
respiration
The local middle school has a fish pond in the courtyard. The pond water is suffering from eutrophication. Which most likely caused this problem?
poor filtration
direct sunlight
fertilizer runoff
improper cleaning
Which would most affect the health of fish in a local pond?
The daily release of hot water into the pond from a local factory
A storm temporarily stirring up water and sediments in the pond.
The occasional erosion of sediments into the pond from a field
A slight increase in the number of people who fish in the pond for food.
