Humans Dependence on Oceans

Front

People depend on the oceans for __________________.

Back

All of the above.

Front

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

Back

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

Front

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

Back

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

Front

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

Back

photosynthesis

Front

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.

Back

Sand drifting along the bottom of the ocean floor.

Front

What is a fertilizer runoff?

Back

When fertilizer runs into a body of water.

Front

What happens when a fertilizer runoff happens?

Back

Algae grow rapidly.

Front

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

Back

Overfishing

Front

If the fishing rate in Asia continues to grow, what will most likely happen as a result?

Back

The overfishing will cause an imbalance in marine ecosystems.

Front

Why do corals die?

Back

All of the above: boat anchors that destroy or break the corals, the gradual warming of the ocean's temperature, and irresponsible divers that kick the corals.