This quiz works best with JavaScript enabled.
Select an option to see the correct answer instantly.
Correct Answer: B) An insecticide ingested by prey species.
Correct Answer: A) Sewage.
Correct Answer: C) Toxic.
Correct Answer: A) Thermal pollution.
Correct Answer: D) Aquifers and springs.
Correct Answer: D) Waste and industrial sewage is sent there to be clean.
Correct Answer: C) Water.
Correct Answer: B) Erosion.
Correct Answer: C) Runoff form agricultural fields.
Correct Answer: A) Oil.
Correct Answer: D) All of the above.
Correct Answer: D) Asphyxiation from lack of oxygen.
Correct Answer: B) High nutrient levels and low DO.
Correct Answer: B) Sewer system.
Correct Answer: B) Salt water.
Correct Answer: B) 3.5 million.
Correct Answer: C) 63 billion gallons.
Correct Answer: C) A reduction in biodiversity in natural systems.
Correct Answer: E) A sewage treatment plant effluent pipe.
Correct Answer: B) Clouds.
Correct Answer: D) Clean Water Act (CWA).
Correct Answer: D) Throwing Trash.
Correct Answer: D) Melting of ice caps.
Correct Answer: B) Lower dissolved oxygen (DO).
Correct Answer: A) Agricultural sources.