SOLAR SYSTEM

Detailed explanation-1: -About 71 percent of the Earth’s surface is water-covered, and the oceans hold about 96.5 percent of all Earth’s water. Water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers, and even in you and your dog. Water is never sitting still.

Detailed explanation-2: -Water covers about 71% of the earth’s surface.

Detailed explanation-3: -Area of land: 148 326 000 km2 (57 268 900 square miles), this are 29% of the total surface of Planet Earth. Area of water: 361 740 000 km2 (139 668 500 square miles), this are 71% of the total surface of the Earth. 97 percent is salt water and only 3 percent is fresh water.

Detailed explanation-4: -Earth is composed of four main layers, starting with an inner core at the planet’s center, enveloped by the outer core, mantle, and crust. The inner core is a solid sphere made of iron and nickel metals about 759 miles (1, 221 kilometers) in radius.

Detailed explanation-5: -Currently, the most favored explanation for where the Earth got its water is that it acquired it from water-rich objects (planetesimals) that made up a few percent of its building blocks. These water-rich planetesimals would have been either comets or asteroids.

Detailed explanation-6: -Earth is made up of land, air, water and life. Mountains, valleys and flat places make up the land. The air is made of different gases. One of the gases is oxygen.

Detailed explanation-7: -It has to do with the different kinds of rocks in the Earth’s crust: continents are made of granite, and ocean crust is made of basalt. The more granite there is, the more continent there is, and the more of the Earth’s surface rises above the ocean basins. Water fills the basins.