GEOLOGY

Detailed explanation-1: -Scientists predict that the water in Earth’s oceans came from water-carrying bodies in the early solar system that collided with our planet, similar to today’s ice-rich asteroids or comets.

Detailed explanation-2: -Geology. Geology is the study of the materials that make up Earth, the processes that form and change these materials, and Earth’s history. Geologists study how rocks and minerals form and the way mountains rise up and erode away.

Detailed explanation-3: -(4.6 billion years ago) As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today’s atmosphere. After about half a billion years, Earth’s surface cooled and solidified enough for water to collect on it.

Detailed explanation-4: -The concentration of salt in seawater (its salinity) is about 35 parts per thousand; in other words, about 3.5% of the weight of seawater comes from the dissolved salts. In a cubic mile of seawater, the weight of the salt (as sodium chloride) would be about 120 million tons.