Oceans remove carbon from the air, regulate the Earth's climate, provide food, provide jobs and provide oxygen. Oceans are the most valuable shared natural resource on Earth.Know More
Oceans make it possible for people to live on Earth. The oceans are responsible for supplying fresh water to the whole planet by forming the clouds that transport fresh water to land. People use the fresh water to grow food, water livestock and drink. Without fresh water, people could not live.
By absorbing the excess carbon dioxide emissions from human waste and activity, the oceans scrub the atmosphere clean. Ocean plants provide half of the oxygen on Earth.
Fish from the oceans are used for the fish industry and for food. Much of the fisheries' catches are ground into oil and fish meal to feed livestock.
Nearly $130 billion flows into the economy from marine-based jobs every year. Ocean tourism, fishing, recreation, mining ore and oil and biomedical research are some marine-related jobs.
The oceans' water holds heat and carry it across huge basins, where it warms the atmosphere. Evaporation cools the water and warms the air, such as in the tropics. Near the poles, less evaporation takes place and the air is not warmed.Learn more about Geology
The partial pressure of oxygen in the atmosphere at sea level is approximately 160 millimeters of mercury, or 160 torr. The calculation comes from the ratio of oxygen in the atmosphere, or roughly 21 percent of 760 millimeters of mercury of air pressure at sea level.Full Answer >
Exhaled air is comprised of approximately 4 to 5 percent less oxygen than was inhaled. The exchange of gases takes place in the alveoli within the lungs in a process called diffusion.Full Answer >
Since the atmosphere has a mass of approximately 5.15 x 10^18 kilograms, the total mass of oxygen in the atmosphere is approximately 1.08 x 10^18 kilograms. Oxygen makes up approximately 20.9 percent of the Earth's atmosphere.Full Answer >
The air that makes up Earth's atmosphere contains 20.9 percent oxygen. This is true up to about 70,000 feet above sea level. However, above 10,000 feet, the atmosphere becomes too thin to support human life, even though its proportions do not change much.Full Answer >