Most people think of the sea as a beach or surfing. But the sea is a fun place to roam. In this lesson, you will learn about the importance of oceans to humans and how we affect the ocean system. The oceans have about 70% of the Earth's surface. There is only one global ocean. Sea and coastal ecosystems provide approximately one million jobs in the United States through fishing, recreation, and tourism. Each year more than 180 million people visit the sea and the coast for entertainment purposes. In fact, more than 50% of the people living on Earth live within 50 miles of the coast and the ocean. Even if you do not live near the sea, you are dependent on it. Let's know more about Human Dependence on Ocean Systems.
1. People depend on the oceans for .....
A. Natural resources
B. Food and water
C. Transportation
D. All of the above-mentioned
2. Freshwater can be produced by removing the salt from ocean water using a process called ...
A. Salt water cleanup
B. Water purification
C. Desalination
D. All of the above
3. Phytoplankton in the ocean produce ______________ through the process of photosynthesis.
A. Oxygen
B. Carbon Dioxide
C. Nitrogen
D. None of these
4. Which of the following is a source of pollution in the ocean?
A. Fertilizers used on land
B. Oils found on city streets
C. Emissions from gas-burning vehicles
D. All of the above-mentioned
5. Which of the best way to keep the ocean clean?
A. Skim trash regularly
B. Establish regulations for safety and environmental regulations
C. Stop using the ocean as a resource
D. None of the following
6. Algae grow rapidly through ...
A. Fertilizer runoff
B. Acid runoff
C. Salt runoff
D. Plastic runoff
7. What happens to the fish if there is fertilizer runoff?
A. The fish thrive because of increase in Nitrogen and Phosphorous
B. The fish die because of lack of oxygen
C. Nothing happens to the fish
D. All of the above
8. Which of the cause of dead zones in the ocean?
A. An increase in runoff from fertilizer
B. A decrease in oxygen
C. Both of the above
D. None of these
9. The ___________ will cause an imbalance in marine ecosystems.
A. Ship transport
B. Overfishing
C. Oil leak
D. None of these
10. A Marine Protected Area is called ...
A. No fishing zone
B. Driving zone
C. Shipping zone
D. None of these
11. Which color does the coral turn when it is bleached?
A. Blue
B. White
C. Clear
D. Yellow
12. Which of the following way humans are trying to positively impact the ocean?
A. Creating artificial reefs
B. Fishing
C. Fishing
D. None of these
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