Eutrophication & Dead Zone of the Gulf

​Eutrophication

S

Multiple Choice

What is the original cause of eutrophication?

• Too many predators

• Too many herbivores

• Excess fertilizer

• Too much oxygen

Dead Zones

An area that cannot support life because of its hypoxic state. There is little to no oxygen in the water. Dead zones are caused by too many nutrients in the water which over stimulate algae growth.

Multiple Choice

Which describes a dead zone?

• An area of low oxygen in water

• A single point where water drains to

• Where fresh water and salt water meet

Multiple Select

(Check all that apply) Dead zones are regions in a body of water where:

• The water is brackish because salt water is mixing with fresh water

• Decomposer microbes have multiplied and are using up oxygen

• Nutrients from runoff are promoting floating algae growth

• No plants are able to grow because of a lack of sunlight

Multiple Choice

One of the primary human causes of dead zone formation is:

• Burning of fossil fuels

• Deforestation

• Overfishing

• Farming with fertilizers

Multiple Choice

Eutrophication is

• form of water pollution where a nutrient, like nitrogen, is suddenly added to an aquatic environment, causing out-of-control algae growth.

• a form of water pollution where a nutrient is added and nothing happens

• form of water pollution that kills algae

Open Ended

How do people contribute to eutrophication?