Water, Part Three

What are the most fragile marine ecosystems?

• estuaries and tropical rainforest

• swamps and forests

• coral reefs, estuaries, and coastal marshes

• swamps only

What is the increase in temperature of a body of water that disrupts an ecosystem?

• thermal pollution

• ocean pollution

• ground water pollution

• noise pollution

What are sources of ocean pollution?

• fertilizers only

• pesticides AND excess nutrients only

• runoff only

• pollutants being dumped directly into ocean AND runoff from land

What is the largest source of water quality problems in the US?

• nonpoint-source pollution

• point-source pollution

• thermal pollution

• marine pollution

Pollution discharged from a single source:

• nonpoint-source pollution

• direct pollution

• point-source pollution

• singular pollution

Examples of nonpoint-source pollution include:

• water runoff containing oil/gas, chemicals added to road surfaces

• precipitation containing air pollution, a leaking underground storage tank

• thermal pollution, water runoff, a leaking underground storage tank

• none of these

The introduction of chemical, physical, or biological agents into water that degrade water quality and harm organisms that depend on the water.

• noise pollution

• water decomposition

• quality degradation

• water pollution

When the concentration of toxins increases as you travel through a food chain:

• biomagnification

• bioillumination

• bioluminescence

• biochemical processes

An area where nutrients from runoff have caused low oxygen levels:

• low-oxygen zone

• dead zone

• estuary free zone

• oxysuffocation zone

This results due to the overuse of fertilizers or detergents:

• thermal pollution

• nutrient build-up segmentation

• artificial eutrophication

• percolation