Question 1

Which of the following best describes nonpoint source pollution?

Accepted Answer

Pollution that comes from multiple, diffuse sources

Question 2

Which of the following best describes an estuary?

Accepted Answer

A coastal area where freshwater meets saltwater

Question 3

Which forest management practice is most likely to increase the risk of landslides and flash floods during hurricanes in Jamaica?

Accepted Answer

Clear-cutting large areas of forest

Question 4

Which zone of a lake is known for high light penetration and supports photosynthesis?

Accepted Answer

Littoral zone

Question 5

What role do decomposers play in aquatic ecosystems?

Accepted Answer

They break down dead organic matter and recycle nutrients.

Question 6

What role do riparian zones play in stream ecosystems?

Accepted Answer

They filter pollutants and provide habitat for wildlife.

Question 7

What is a significant human impact on lake ecosystems?

Accepted Answer

Invasive species introduction

Question 8

The image shows two pipes discharging water into a stream. Is this an example of point source or nonpoint source pollution?

Accepted Answer

Point source

Question 9

Which of the following is a major challenge in managing nonpoint source pollution?

Accepted Answer

It often requires collaboration between multiple stakeholders.

Question 10

Which of the following pollutants is most likely to cause eutrophication in aquatic ecosystems?

Accepted Answer

Livestock manure run-off

Question 11

Which of the following is the main goal of a sanitary sewer system?

Accepted Answer

Separate stormwater run-off from sewage

Question 12

Below what level of dissolved oxygen content is water considered hypoxic?

Accepted Answer

2 ppm

Question 13

Which chemical reaction is responsible for ocean acidification due to increased atmospheric $$CO_2$$?

Accepted Answer

$$CO_2 + H_2O$$ \rightarrow $$HCO_3^- + H$$^+$$

Question 14

Which of the following is NOT a typical impact of sediment pollution in aquatic environments?

Accepted Answer

Increases dissolved oxygen levels

Question 15

A lake receives excess nutrients from nearby farms, leading to an algal bloom. What is the most likely consequence for aquatic life?

Accepted Answer

Decrease in dissolved oxygen due to decomposition

Question 16

Which of the following heavy metals is considered most toxic to aquatic life?

Accepted Answer

Mercury

Question 17

Which legislative act first established federal standards for drinking water in the United States?

Accepted Answer

Safe Drinking Water Act 1974

Question 18

What is the primary impact of increased Biological Oxygen Demand (BOD) in a river receiving organic waste?

Accepted Answer

Decreased oxygen levels, leading to anoxia

Question 19

Which of the following is a recommended strategy for preventing excess nutrient contamination in water bodies?

Accepted Answer

Ban phosphate soaps

Question 20

Thermal pollution in aquatic ecosystems can lead to which of the following outcomes?

Accepted Answer

Interference with reproduction and increased disease vulnerability

Water Pollution and Aquatic Ecosystems: Causes, Impacts, and Management

Study Guide - Practice Questions