EVERYDAY SCIENCE

Detailed explanation-1: -The hydrosphere is the sum of Earth’s water, in the ocean, the ground, on the surface, and in the air. Approximately 71 percent of Earth’s surface is covered in water.

Detailed explanation-2: -About 97 percent of Earth’s water is in the ocean. The ocean covers more than 70 percent of the surface of our planet. It’s hard to imagine, but about 97 percent of the Earth’s water can be found in our ocean. Of the tiny percentage that’s not in the ocean, about two percent is frozen up in glaciers and ice caps.

Detailed explanation-3: -The hydrosphere covers approximately 70 percent of the earth. It includes the oceans, rivers, lakes and streams.

Detailed explanation-4: -By far, most of the hydrosphere is salt water – around 97 percent – but the 3 percent that is fresh is critical for terrestrial and fresh water species.

Detailed explanation-5: -Notice how of the world’s total water supply of about 332.5 million cubic miles of water, over 96 percent is saline. And, of the total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground.