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A student wanted to test how the temperature of water affects the rate at which a substance dissolves. Based on this information, which is the independent variable in the student’s investigation?
Temperature of the water
Where is most of Earth's freshwater available for human use stored?
Lakes and rivers
Rivers, lakes, aquifers, and reservoirs make up what percent of all the water on the planet?
about 1%
When heated water is released from factories or power plants is an example of what?
Thermal pollution
Specific sources of pollution that can be identified, like discharge from a pipe at a sewage treatment plant or an oil tanker spill in the Gulf of Mexico, are called
Point source pollution
What do you call the condition of water when the oxygen levels reach such an extreme low that aquatic animals are forced to either flee or die?
Hypoxic
What is meant by "potable water"?
Water that is clean enough to drink
The mixture of fresh and salt water is called -
brackish water
Which of these is NOT an example of a freshwater wetland? Answer choices: bogs, swamps, freshwater marshes, mangrove forests
mangrove forests
Which of these is NOT an example of a freshwater wetland? answer choices bogs swamps freshwater marshes mangrove forests
Which is an abiotic factor that most limits the number of frogs living in a pond? Answer choices: the color of the water, the number of predators, the temperature of the water, the populations of producers
the temperature of the water
How do toxic heavy metals move from soil to lakes and streams?
runoff
Large blooms of algae on the surface of a lake keep which abiotic factor from reaching the bottom?
light
Which of the following produces the greatest water pollution? answer choices: Agriculture, Fishing Industry, Water sports, Aquatic organisms
Agriculture
Virginia’s water generally empties into what?
The Atlantic ocean
What is an important source of pollution in the Chesapeake Bay?
Using too much fertilizer
Why is it important to keep pollution out of the nearest stream or river?
The pollution found in the local stream or river eventually flows into the ocean.
The largest estuary in the contiguous 48 states is the
Chesapeake Bay
The widening channel of a river where it meets the sea, mixing fresh water and salt water
Estuary
What term describes the action of smaller streams and rivers feeding into larger rivers of a watershed?
Tributaries
The land that water flows across or through on its way to a body of water is called
Watershed


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