7.11B Human Impact on Ocean Systems

The commercial fishing industry uses large nets to capture fish. Often, these nets catch many species of organisms that are not used by humans. This is called bycatch. What change could lessen the negative effect of this practice of the commercial fishing industry? 

• Exploring new and uncharted areas of the ocean where the nets can be used

• Decreasing the size of the nets but using more of them

• Designing nets that release unwanted species without harming them

• Using the nets in deeper regions of the ocean where different organisms live

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Using the image provided, which answer choice correctly summarizes how the pollution from the factory and the commercial fishing industry are connected?

• The factories provide nutrients for the fish, increasing their populations, which in turn helps the fishing industry by increasing their profits.

• The factories produce pollution, which ends up in the water, reducing the number of animals in the oceans. The fishing industry then cannot catch enough fish to meet the demand.

• The fishing boats produce pollution, which impacts the factory’s ability to produce its product.

• The fishing boats catch the majority of fish in the oceans, which prevents the factories from having the required materials to function.

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Which of the following substances necessary for human life is produced by ocean organisms that photosynthesize?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

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Humans depend on the oceans for many aspects of their lives. Which of the following summarizes how life would be different if the ocean ecosystems collapsed?

• The recreation industry would collapse because of the lack of available and abundant fish populations.

• The temperature regulation of the oceans would collapse because of the lack of available and abundant fish populations.

• The oil drilling industry would collapse because of the lack of available and abundant fish populations.

• The commercial fishing industry would collapse because of the lack of available and abundant fish populations.

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5. Many of the ways oceans are impacted are shown in the image provided. How many of the methods shown do humans have control over? 

• All of them

• 8 of 13

• 5 of 13

• 10 of 13

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6. Humans contribute to the chemical pollution of oceans in many ways. Which of the following is a method in which humans contribute to the chemical pollution of our oceans? 

• Spraying fertilizer on yards, public spaces, and agricultural areas

• Boat traffic interfering with the communication methods of large aquatic mammals

• Leaking oil, gasoline, and other chemicals from cars and boats

• Collecting rainwater to reuse as irrigation for farms

• Runoff from manufacturing plants located near waterways

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7. The image provided here shows a factory and its cooling tank. In which of the locations could pollution be released that would negatively impact our ocean systems? 

Circle the correct answer(s). 

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The graph provided shows the sources of ocean pollution. Which two resources together can impact the ocean system the most? 

• 1. Air pollutants and oil spills 

• 1. Land runoff and air pollutants 

• 1. Oil spills from shipping and litter dumped into the ocean 

• Land runoff and oil spills

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The graph provided shows the sources of ocean pollution. Land runoff and air pollutants impact the ocean system the most.

Which statement best explains the reason for this.

• 1. Humans pollute the air, land, and ocean. Even though air and land pollution are not part of the ocean, they still have large effects on the ocean systems. 

• Oil spills and litter are the only two sources of pollution that occur in the ocean.

• 1. Air pollutants and oil spills occur more often than any of the other types of pollution. 

• Oil spills and land runoff are easier to clean up than pollutants from land.

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9. Humans depend on oceans for oxygen and transportation. How many of the following are other ways humans depend on the oceans? 

11. 1. Provides most of our drinking water

12. 2. Recreational activities

13. 3. Source of minerals

14. 4. Food

15. 5. Provides many jobs for humans

16. 6. Medicines created from organisms in the oceans

17. 7. Relief from hurricanes

• 4

• 5

• 6

• 7