Human Dependence on Oceans

How do the oceans contribute to the amount of Oxygen in the Earth's atmosphere?

• Fish in the ocean produce oxygen.

• Phytoplankton in the ocean produce oxygen through the process of respiration.

• Phytoplankton in the ocean produce oxygen through the process of photosynthesis.

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Which of the following is NOT a source of pollution in the ocean?

• Fertilizers used on land.

• Sand drifting along the bottom of the ocean floor.

• Oils found on city streets.

• Emissions from gas-burning vehicles.

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What happens when a fertilizer runoff happens? (a)  

• Fish get bigger.
• Algae grow rapidly.
• The water becomes very clear.

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What is one way humans are trying to positively impact the ocean? (a)  

• Fishing
• Drilling for oil and natural gas
• Creating artificial reefs

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An artificial reef is a man made structure that may mimic some of the characteristics of a natural reef. (a)  

• True
• False

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How can you help impact the environment in a positive way (a)  

• recycle
• drive less, creating less pollution
• save water
• all of the above

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Coral reefs are endangered by (a)  

• climate change
• overfishing
• pollution
• all of the above

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The largest source of pollution in the ocean comes from (a)   .

• Runoff
• Acid Rain
• Wind

How are phytoplankton similar to small trees?

• Both are at the top of the food chain

• Both conduct photosynthesis

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Which of the following is associated with dead zones in the ocean? (a)  

• A decrease in oxygen levels.
• An increase in oxygen levels.

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