Question

write a paragraph on the origin of ocean

Answer 1

The origin of the oceans goes back to the time of the earth's formation 4. 6 billion years ago, when our planet was forming through the accumulation of smaller objects, called planetesimals. There are basically three possible sources for the water. It could have (1) separated out from the rocks that make up the bulk of the earth; (2) arrived as part of a late-accreting veneer of water- rich meteorites, similar to the carbonaceous chondrites that we see today; or (3) arrived as part of a late-accreting veneer of icy planetesimals, that is, comets."The composition of the ocean offers some clues as to its origin. If all the comets contain the same kind of water ice that we have examined in Comets Halley and Hyakutake--the only ones whose water molecules we've been able to study in detail-- then comets cannot have delivered all the water in the earth's oceans. We know this because the ice in the comets contains twice as many atoms of deuterium (a heavy isotope of hydrogen) to each atom of ordinary hydrogen as we find in seawater.
mark as brainlist please...