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Directions: The passage below is followed by several questions. After reading the passage, choose the best answer to each ACT Science practice question. You may refer to the passage as often as necessary. Calculators may NOT be used on this test.
A change in the pH of the water.
The increasing changes in phytoplankton.
Agricultural run-off from human activity.
The build-up of phosphates in the body of water.
The source of the nitrogen.
The root cause of the eutrophication.
The effects of the lack of oxygen.
The effect of the plant life in the aquatic ecosystem.
algae that will occasionally grow in aquatic ecosystems due to human activities.
a bloom of phytoplankton that grows in response to high levels of phosphates.
a large build-up of algae that grows at a rapid rate in a body of water.
an explosion of algae due to natural factors and the need to reduce overpopulation.
the control of overpopulation in an aquatic ecosystem.
the natural control of the pH of water in an aquatic ecosystem.
the normal process that takes place in a pond in response to farmland runoff.
the rejuvenation of aquatic life, which thrives during such an event.
point to a human activity that would cause eutrophication.
show that humans changing natural land is bad for the environment.
bolster his case for humans causing a change in the pH of the water that leads to eutrophication.
bolster his case that human activity such as farming increases nitrates, leading to eutrophication.
A regrowth of new life because of the nitrates in the water.
The death of the phytoplankton when it over-accumulates.
A massive die off of both plant and animal life in the aquatic environment.
The growth of more plant life in the water as they grow well with plankton.
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