1. Where is most freshwater on Earth Found?
The answer is D
Ice Caps and Glaciers
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2. How does algal growth caused by agricultural waste kill marine organisms?
The answer is A
by blocking sunlight and depleting oxygen.
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3. Which of the following is not a major source of freshwater pollution?
The answer is C
Treated sewage
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4. Which of the following does not reduce water pollution?
The answer is C
increasing the use of gasoline.
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To find the answer to the question "Where is most freshwater on Earth found?", you need to know that freshwater is found in various sources such as rivers, lakes, underground aquifers, and ice caps/glaciers. By understanding that the majority of Earth's freshwater is stored in ice caps and glaciers, you can select option D as the correct answer.
To understand how algal growth caused by agricultural waste kills marine organisms, you need to know that excessive nutrients from agricultural runoff, such as nitrogen and phosphorus, can stimulate the growth of algae in bodies of water. As the algae multiply, they form dense blooms that can block sunlight from reaching other aquatic plants and deplete oxygen levels, leading to the death of marine organisms. With this knowledge, you can identify option A as the correct answer.
To identify the major sources of freshwater pollution, you need to know that common sources include industrial wastewater, agricultural runoff, untreated sewage, and chemical pollutants. By recognizing that treated sewage is not a major source of freshwater pollution, you can select option C as the correct answer.
To determine which option does not reduce water pollution, you need to understand the concept of water pollution reduction. Options such as reducing industrial waste, improving wastewater treatment processes, and developing environmentally-friendly agricultural practices can help reduce water pollution. However, increasing the use of gasoline does not directly contribute to reducing water pollution. Therefore, option C is the correct answer.
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