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WorksheetsGulf of Mexico Dead Zone Quiz
Total questions: 20
Worksheet time: 10mins
Which major river flows into the Gulf of Mexico and contributes to the dead zone?
Missouri River
Colorado River
Mississippi River
Rio Grande
What nutrients primarily contribute to the formation of the Gulf of Mexico dead zone?
Carbon and Nitrogen
Nitrogen and Phosphorus
Sulfur and Phosphorus
Oxygen and Carbon
What happens when excess nutrients enter the Gulf of Mexico?
Increases fish population
Causes phytoplankton blooms followed by oxygen depletion
Cleans the water naturally
Boosts coral growth
A dead zone is an area in the ocean that...
Has an overpopulation of marine life
Has low or no dissolved oxygen and little marine life
Has high levels of biodiversity
Is home to coral reefs
How long does the Gulf of Mexico dead zone typically last?
All year
Winter only
Spring until fall
One month
What is the leading cause of water pollution globally?
Industrial waste
Urban runoff
Agricultural activities
Plastic pollution
Which of the following is a point source of water pollution?
Runoff from croplands
Sewage-treatment plant discharge
Street runoff
Lawn fertilizer runoff
What happened to the Cuyahoga River in 1969?
It flooded the city of Cleveland
It caught fire due to pollution
It froze over unexpectedly
It dried up
What percentage of India’s water resources are heavily polluted?
25%
50%
66%
75%
What does BOD (Biochemical Oxygen Demand) measure?
Oxygen released by algae
Oxygen needed by aerobic organisms to break down organic material
The oxygen produced by photosynthesis
The amount of dissolved nitrogen
What type of water body is less effective at diluting pollutants due to stratification and low flow?
Rivers
Streams
Lakes and reservoirs
Oceans
Cultural eutrophication is mainly caused by...
Natural nutrient cycling
Human activities increasing nutrient input
Acid rain
Climate change
How does the Gulf of Mexico dead zone impact marine food webs?
Increases fish diversity
Kills seabirds and marine mammals dependent on fish
Reduces algae blooms
Improves fishing industry
How have dams and flood control on the Mississippi River affected nutrient pollution?
Reduced nutrient pollution
Increased nutrient and sediment pollution
Had no effect
Cleaned up the water
What percentage of drinking water in the U.S. comes from aquifers?
10%
25%
50%
75%
Which pollutant is commonly found in groundwater and is difficult to remove once contamination occurs?
Carbon dioxide
Fertilizers
Saltwater
Sand
What is the primary source of human-related ocean oil pollution?
Tanker spills
Offshore drilling
Urban and industrial runoff
Natural seeps
What is the Great Pacific Garbage Patch mostly made of?
Glass and metal
Plastic waste
Organic debris
Rubber products
What was the cause of the Flint, Michigan water crisis in 2014?
Lead contamination from old pipes
Mercury runoff
E. coli in the water
Oil spill
What does the Clean Water Act of 1977 aim to do?
Promote bottled water consumption
Protect streams, lakes, and wetlands from pollution
Encourage offshore drilling
Increase ocean shipping routes
