Which human action would most likely increase the nutrients in an ecosystem?

A company has acquired land next to a local river. One month after the company opened, the pH of the river dropped from 6.7 to 6.2, and the month after that, the pH was 5.9. Which effect would lowering the pH most likely have on the organisms?

Which best describes the water distribution in an estuary?

Which human activity would have the greatest positive impact on the water quality of a stream?

According to scientists, only 1% of the water on Earth is available for human use. Where is this available water most likely found?

Why do lakes, rivers, and streams most likely require more treatment than groundwater?

Why is filtration an important part of water treatment?

Which dissolved gas is added to ocean water as a result of photosynthesis?

While Kevin’s family was making a cross country trip, he saw a sign that said, “Now entering the Cape Fear Watershed.” He asked his father what that meant. How did his father most likely explain a watershed?

Why can organisms live in the deep ocean?

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