Humans and Oceans

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

• Fishing

• Creating artificial reefs

• Harvesting oil and natural gas

• Transporting goods in ocean vessels

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This graph shows the sources of the nitrogen entering the Gulf of Mexico as pollution. What is one conclusion you can make based on the information in the graph?

• Nitrogen that comes from the atmosphere is more harmful than nitrogen that comes from crops.

• Most nitrogen pollution found in the Gulf of Mexico comes from farming crops.

• Corn and soybeans are the only crops associated with nitrogen pollution.

• Nitrogen is not a problem in the Gulf of Mexico.

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

• Nitrogen and phosphorus from fertilizers used on land.

• Oils found on city streets.

• Sand drifting along the bottom of the ocean floor.

• Emissions from gas-burning vehicles.

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NGSS.MS-ESS3-3

The largest source of pollution in the ocean comes from __________.

• Oil Spills

• Acid Rain

• Runoff

• Wind

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

• A decrease in nitrogen levels.

• An increase in oxygen levels.

• An increase in the number of fish.

• Runoff from fertilizers.

Which of the following describes a negative consequence of commercial fishing?

• Removal of invasive species
• Ocean food webs become imbalanced
• Increased dissolved oxygen concentration
• Fishing vessels cause water to warm upSelect
  

If we keep burning fossil fuels, increasing CO₂, and increasing the acidity in the ocean, a greater threat to the ocean life would be?

• coral reefs - the acid eats away at the calcium carbonate that makes up the reef.

• algae - the acid makes it easier for the algae to grow.

• sea turtles - the acid strengthens their shells.

• kelp - the acid strengthens their ability to keep their roots attached.

Human activity can cause excess nutrients in our watershed that are harmful to the ocean system. Where do excess nutrients, such as nitrogen and phosphorous, typically come from?

• Sediment or dirt

• Trash

• Oil and chemical spills

• Overuse of fertilizers

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Ocean travel by ship, the exotic animal trade, and changing weather patterns can introduce what?

• A native (naturally found) species which are added to an area.

• A non-native or invasive species (not naturally found) species added to an area.

• A keystone species in an environment

• none of the above

Invasive species grow quickly due to the lack of predators, this leads to a decline or extinction of the native population. True or false? 

• false
• true

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