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dependent on the opinion of the person there are two sets of answers.
FIRST ANSWER:
1.) First there is a belief of scientific theory....!Earth had to be eather burnning hot, and once it was cooled down there were gases that were released and by some chance of probability, hydrogen and oxygen came togeher thus forming "H2O" also known as "water"; 2.) Or, the Earth had to be freezing ice cold subzeo tempiture; colder than Vostok Station in Antarctica with an elevation of around 11,500' not only colder than the South Pole, but is considered the coldest place on Earth with an average temperature of -67F. However according to climent change ice begain to melt transforming into H2O; and salt generally is from granite rock." Put granite and water together what do you get ?"
SECOND ANSWER:
1.) There is also the belief of creationism.....! in which there is higher power in charge. During creation water was of the surface before earth. Water was gathered together unto one place, and dry land appeared, thus calling water gathered together in one place Sea (also known as Ocean) and land Earth.
I do not believe the comet theory, there would be obvious signs elsewhere to conclude this.I DO believe because of magnetic changes in our solar system and Sun effects the cycle of things. I also believe the Earth's core can swell because of these changes indirectly having the effect of pushing water levels up to catastrophic levels.
I gree with the above.The core swells pushing water levels high.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoThe air and oceanic plants.
The air above the water is one source.
Oxygen from the air simply mixes with the water and dissolves in the ocean.
Another source of oxygen is that given off by plants living in the water.
Plants use carbon dioxide in the water for photosynthesis.
As a result of photosynthesis, oxygen is released.
Wiki User
∙ 11y agoIt dissolves from the air and also green plants such as seaweed produce it and it dissolves. Also, it's dissolved in the waters that come into the sea from rivers.
Wiki User
∙ 11y agoVery gradually, oxygen in the oceans dissolves from a very small proportion of the atmosphere
Produced by plants such as algae
Wiki User
∙ 12y agoatmosphere and space
Wiki User
∙ 14y agorain
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Where does the free oxygen in Earths atmosphere come from?
The free oxygen bubbled up from the oceans.
Where does most of the water in a river come from?
oceans
Where is the forest that produces most of Earth's oxygen?
The bulk of oxygen production on Earth is from phytoplankton in the oceans.
What role do plankton play in The oxygen?
they produce oxygen in the oceans
Where does most of the oxygen come from?
oxygen mostly comes from our trees & plants
Where do the oxygen atoms in the CO2 come from?
The oxygen most often comes from the atmosphere which is 21% oxygen.
What role do the plankton play in the oxygen cycle?
they produce oxygen in the oceans
Where does most of your oxygen come from?
Plants and trees.
What are oceans in earth science?
Oceans are bodies of water that make up the oxygen in our environment
What is the place with the most oxygen on earth?
The pacific ocean. Green algae in the oceans produce the majority of the Earth's oxygen. The rainforests add a much smaller amount.
Where scallop comes from?
Scallops come from sandy or muddy bottoms of most seas and oceans.
Where does most of the water that evaporates on earth come from?
This water is from oceans, seas, lakes, rivers.
