origin of the ocean

Question 1

accretion

Answer 1

the process by which solid celestial bodies are added to existing bodies during collisions

Question 2

the formation of earth

Answer 2

through accretion and followed by a period of melting and intense volcanic activity

Question 3

magma

Answer 3

molten rock typically dominated by silica (3.2)

Question 4

accreted materials

Answer 4

sediment, volcanic arcs, seamounts, oceanic crust or other igneous features became the ocean through

Question 5

gases released by volcanic activity

Answer 5

water vapor, carbon dioxide (CO2), sulfur dioxide (SO2), carbon monoxide (CO), hydrogen sulfide (H2S), hydrogen gas, nitrogen, and methane (CH4)

Question 6

difference between lighter and heavies gases

Answer 6

Lighter gases such as hydrogen and helium dissipated into space, but the heavier gases remained and formed Earth’s early atmosphere.

Question 7

what’s outgassing

Answer 7

where dissolved substances in magmas are released as gases when the pressure is reduced (5.2)

Question 8

what happened after the earth cooled?

Answer 8

the water vapour in the atmosphere condensed and fell as rain.

Question 9

what’s the hydrological cycle?

Answer 9

the cycling of water through the ocean, atmosphere, lakes, organisms, and other reservoirs (5.2)

Question 10

what are the proportions of Earth’s water found in the various reservoirs?

Answer 10

ocean water (97%)
glacial ice (2.06)
groundwater (0.90)
surface water (0.03)
atmosphere (0.001)

Question 11

How did the oceans get salty?

Answer 11

Most of the salts and dissolved elements in the ocean were probably outgassed along with the water vapor, so the ocean has probably always been about as salty as it is now.
steady-state in regards to salinity