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Water Quality (SI)

Quiz by Norman Mitchell

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13 questions
Show answers
  • Q1
    Kevin measured the dissolved oxygen levels in the Chesapeake bay. He compared his measurement with the oxygen required by different species of animals that live in the bay. If Kevin's reading showed that the dissolved oxygen was 4, which species would be at risk?
    blue crabs, yellow perch, and striped bass
    yellow perch and striped bass
    striped bass
    worms, blue crabs, yellow perch, and striped bass
    60s
  • Q2
    The health of any water system relies on the balance of many factors. Suppose a river's pH level drops sharply due to construction projects on its banks. Which statement best predicts how such a change will affect the organisms that live in the river?
    The organisms that live in the river will quickly adapt to the current pH level.
    Most of the organisms that live in the river will die, even if the change is very slight.
    A number of organisms that live in the river might die depending on the severity of the drop.
    The organisms that live in the river will be healthier depending on the amount of the drop.
    60s
  • Q3
    The Fish and Wildlife Commission is conducting research on fish populations in one of the nation's largest rivers. According to the research, fish numbers are steadily declining each year. If the scientists want to better understand what is happening to the fish, what measurement would yield the best data?
    the length of the river
    fish population data from the nearest lake
    opinions from local fishermen
    dissolved oxygen in the water
    60s
  • Q4
    Many cities have volunteer programs for citizens to monitor the water quality of the neighborhood streams and ponds. Why is it important to monitor a watershed's water quality?
    so that the community can have meetings and social events
    so that problems in the watershed can be identified before they become too serious
    so that citizens can clean the water using their own treatments
    so that the city can give tax breaks to areas affected by poor water quality
    60s
  • Q5
    Why are water quality standards important?
    There is a limited amount of clean water in the world, and like oil, once it is used up, it is gone.
    The standards guarantee that every home in the nation has safe drinking water.
    Industries would not self-regulate, and the standards force them to treat unsafe water.
    They help protect clean water and improve the quality of polluted water.
    60s
  • Q6
    How could a scientist best investigate whether a certain pesticide that is harmful to fish is being carried into the water supply?
    Test samples of the rain water that falls at a farm that uses the pesticide.
    Take a survey to find out whether people think that their water is safe.
    Count the number of fish that have died near farms that use the pesticide.
    Test samples of water in rivers and lakes near farms that use the pesticide.
    60s
  • Q7
    Which of the following can cause a decrease in dissolved oxygen in the water?
    a small population of fish
    a large number of plants
    excessive plant debris
    lack of animal life
    60s
  • Q8
    Water clarity, or turbidity, measures the amount of sediment and debris in a body of water. Since light cannot shine into water with low clarity, turbidity is a factor that is considered when monitoring water quality. Which of the following organisms would be most negatively affected by unclear water?
    plants growing on the lake floor
    trees growing along the lake shore
    trout feeding near the lake surface
    geese nesting on the bank of the lake
    60s
  • Q9
    Why is an overabundance of nutrients harmful to a water supply?
    It decreases the number and types of aquatic plants.
    It causes excessive aquatic plant growth.
    It kills all aquatic plants.
    It sterilizes water.
    60s
  • Q10
    Society makes sure that water is safe for people to drink by making sure people do not add dangerous chemicals to lakes and rivers.
    FALSE
    TRUE
    60s
  • Q11
    Society makes sure that water is safe for people to drink by monitoring the water to look for dangerous substances.
    FALSE
    TRUE
    60s
  • Q12
    Society makes sure that water is safe for people to drink by making sure the water looks clear.
    FALSE
    TRUE
    60s
  • Q13
    Society makes sure that water is safe for people to drink by storing the water in plastic bottles.
    TRUE
    FALSE
    60s

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