Question

Of the earth's total geographical area ___________ percent of area is covered with water.

• A. $66.6$
• B. $70.78$
• C. $29.22$
• D. $50.5$

Answer 1

The correct option is B $70.78$

• About 70.78% of the earth’s surface is covered with water.
  
• Ninety-seven percent of the water on the earth is salt water.
• Salt water is filled with salt and other minerals, and humans cannot drink this water.
• Although the salt can be removed, it is a difficult and expensive process.
  
• Two percent of the water on earth is glacier ice at the North and South Poles.
• This ice is fresh water and could be melted; however, it is too far away from where people live to be usable.
  
• Less than 1% of all the water on earth is fresh water that we can actually use.
• We use this small amount of water for drinking, transportation, heating and cooling, industry, and many other purposes.