Dead Zones and Algae Blooms

What is causing the depletion of oxygen in oceans and lakes?

• Natural phenomena

• Human activity

• Climate change

• Marine life

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What are dead zones?

• Areas with high oxygen levels

• Areas with low oxygen levels

• Areas with excessive algae growth

• Areas with toxic marine life

Tags

NGSS.MS-LS2-3

What are the leading contributors to dead zones?

• Intensive agriculture and animal manure

• Wastewater treatment and fossil fuel emissions

• Phosphorus and nitrogen

• Plankton and nutrients

Tags

NGSS.MS-LS2-3

What happens when nutrients are overloaded in water?

• Fish population increases

• Algae blooms multiply

• Oxygen levels rise

• Bacteria consume nutrients

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Where is the world's second largest dead zone located?

• Gulf of Mexico

• Lake Erie

• British Columbia

• Mississippi River

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

What is the main source of nutrients entering the Gulf of Mexico?

• Wastewater from cities

• Excess fertilizer runoff

• Livestock manure

• Rainfall and drought

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What is the impact of dead zones on the fishing industry?

• Increase in fish population

• Decrease in fish habitat

• Improvement in water quality

• Expansion of fishing regions

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the purpose of the Venus observatory in British Columbia?

• To study marine life in dead zones

• To monitor toxic algae blooms

• To measure oxygen levels in lakes

• To observe the effects of hypoxia

What is the main cause of the dead zone in Lake Erie?

• Excessive rainfall

• Industrial pollution

• Phosphorus and nitrogen runoff

• Toxic algae blooms

Tags

NGSS.MS-ESS3-4

How can the dead zone problem in Lake Erie be solved?

• Reducing water flow into the lake

• Increasing fish production

• Changing agricultural practices

• Implementing stricter regulations

Tags

NGSS.HS-ESS3-4

NGSS.HS-LS2-7