Ocean Systems

Ocean Systems

By Meredith Vera

Human Impact on Ocean systems​

Runoff​

Fertilizer

​Fertilizer runoff causes coastal algae to increase ; the algae take most of the oxygen in the water, causing fish to die and disrupting the food chain for humans and other organisms.

Multiple Choice

What happens when a fertilizer runoff happens?

• Fish get bigger.

• Algae grow rapidly.

• The water becomes very clear.

• The oxygen level in the water increases.

Multiple Choice

What happens to the fish if there is fertilizer runoff?

• The fish thrive because of increase in Nitrogen and Phosphorous.

• The fish die because of lack of oxygen.

• Nothing happens to the fish.

• The fish thrive because there is more algae to eat.

Multiple Choice

People depend on the oceans for __________________.

• Natural resources

• Food and water

• Transportation

• All of the above.

Multiple Choice

Fisheries renew themselves naturally each year, but __________________ has caused a shortage of fish in some areas.

• Aquaculture

• Fishing regulations

• Overfishing

• Global warming

Multiple Choice

The use of light energy by organisms to convert CO2 and H2O into organic molecules is

• chemosynthesis

• consumption

• photosynthesis

• decomposition

Multiple Choice

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.

Multiple Choice

Which piece of evidence BEST explains why trash has accumulated in the ocean?

• Humans manufacturing and quickly discarding plastic products has caused the garbage patches to grow.

• The best way to discard plastic trash is to dump it in the ocean.

• Only plastic that cannot be recycles is found in the ocean.

• Trash has not accumulated in the ocean.

Multiple Select

Which of the following is the cause of dead zones in the ocean?

• An increase in the number of fish.

• An increase in runoff from fertilizer

• An increase in oxygen

• A decrease in oxygen

Multiple Choice

Review the graph showing marine fishing rates.If the fishing rate in Asia continues to grow, what will most likely happen as a result?

• The fish population will continue to rise.

• A wide range in ocean temperatures will be seen worldwide.

• The U.S. human population will decline.

• The overfishing will cause an imbalance in marine ecosystems.

Multiple Choice

A Marine Protected Area is

• an area of the sea where we dump rubbish

• an area of the sea where there are no laws

• a protected “no fishing” zone.

• an area where commercial farmers are allowed to fish.

Multiple Choice

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

• Fishing

• Drilling for oil and natural gas

• Creating artificial reefs

• Transporting goods in ocean vessels

Multiple Choice

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

• True

• False