Question

Water covers ___percent of the total surface area of the earth.
A. 66
B. 71
C. 75
D. 90

Answer 1

Hint: Everything in Earth's environment can be put into one of four significant subsystems: land, water, living things, or air. These four subsystems are designated "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "climate" (air).

Complete step by step solution:
The Hydrosphere - contains all the solid, liquid, and vaporous water of the planet. a little bit of the water in the hydrosphere is fresh and the rest is salty. This water streams as precipitation starting from the atmosphere to Earth's surface, as waterways and streams along Earth's surface, and as groundwater underneath Earth's surface. This sphere includes sea, gulf, strait, bay, rivers, ponds, etc. The Earth is a watery planet. It is often nicknamed the Blue Planet. Around \[71\% \] of the Earth's surface is water-covered, and the ocean holds about \[96.5\% \] of all Earth's water. Water likewise exists all around as water vapor in the atmosphere, in waterways and lakes, in icecaps and icy masses, in the ground as soil dampness and in springs, and even in you. Water is rarely sitting still. Because of the water cycle, our planet's water supply is continually moving to start with one spot then onto the next, and starting with one form then onto the next.

Thus, option (B) is correct.

Note: By far most water on the Earth's surface, more than 96 percent, is saline water in the seas. The freshwater assets, for example, water tumbling from the skies and moving into streams, waterways, lakes, and groundwater, give individuals the water they need each day to live.