Trouble in the Oceans

What are dead zones primarily caused by? Select all that apply.

• Overfishing

• Fertilizer

• Natural disasters

• Increased sea temperatures.

Which of the following are dead zones? Select all correct answers.

• The Baltic Sea

• The Mississippi River Delta

• The Sahara Desert

• The Chesapeake Bay

What happens to the algae after they bloom and die? Select all correct answers.

• They sink to the floor.

• They increase oxygen levels in the water.

• They create bacteria.

• They provide food for other aquatic animals.

How do chemical plants cause dead zones?

• By releasing oxygen into the water.

• Through pollution runoff.

• By creating large algal blooms.

• By increasing the number of fish.

What are some solutions to help stop the creation of dead zones? Select all correct answers.

• Developing plant roots that hold more nutrients.

• Reducing pollution from factories.

• Increasing the use of fertilizer.

• creating green spaces along waterways.

What is a key detail that supports the main idea of how dead zones are created?

• Dead zones are only found in the Great Lakes.

• Algae absorb nutrients fertilizers and decompose, consuming oxygen.

• Overfishing.

• Natural disasters have no impact on ocean

How does the author support the idea of potential solutions to dead zones? Select all correct answers.

• By suggesting the development of nutrient holding plant roots.

• By providing examples of successful projects.

• By mentioning the reduction of factory pollution.

• By stating that dead zones will never disappear.