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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.
What else can I help you with?
Where does most of the water in a river come from?
oceans
Where does the most oxygen come from?
The majority of the Earth's oxygen comes from phytoplankton and terrestrial plants through the process of photosynthesis. Phytoplankton in the oceans are estimated to produce about 50-85% of the world's oxygen.
What two elements make up most of the oceans?
The two elements that make up most of the oceans are hydrogen and oxygen, forming water molecules.
Which plant produces the most oxygen in the world?
The plant that produces the most oxygen in the world is the phytoplankton, which are tiny marine algae found in oceans and bodies of water.
What element is most abundant in the earths crust atmosphere and oceans?
Oxygen is the most abundant element in the Earth's crust, atmosphere, and oceans. It makes up about 46% of the Earth's crust by weight, about 21% of the atmosphere, and is a key component of water in the oceans.
Which element is the second-most-abundant in the earth's crust-oceans and atmosphere?
That might be a tough one to assess as the most notable two, in order, areCRUST: oxygen 47% and siliconOCEANS AND WATER FLOWS: Hydrogen and oxygenATMOSPHERE: Nitrogen 80% and oxygen
What role do plankton play in The oxygen?
they produce oxygen in the oceans
Where does most of your oxygen come from?
Plants and trees.
What role do the plankton play in the oxygen cycle?
they produce oxygen in the oceans
Where does most of the water that evaporates on earth come from?
This water is from oceans, seas, lakes, rivers.
Where scallop comes from?
Scallops come from sandy or muddy bottoms of most seas and oceans.
What are oceans in earth science?
Oceans are bodies of water that make up the oxygen in our environment
