The Importance of Fresh Water

The video explains that over 70% of Earth's surface is covered with water, mostly saltwater in oceans. Only 2.8% is freshwater, with over half frozen in glaciers. A small fraction is underground, and the rest is in lakes and rivers. A visual analogy using cups illustrates the scarcity of readily available freshwater.

What percentage of Earth's surface is covered by water?

• 90%

• 30%

• 50%

• 70%

What proportion of Earth's water is saltwater?

• 97%

• 80%

• 60%

• 50%

What percentage of Earth's water is freshwater?

• 5%

• 1%

• 10%

• 2.8%

Where is most of the Earth's freshwater stored?

• Underground

• Rivers

• Glaciers

• Oceans

How much freshwater is readily available for human use compared to the total water on Earth?

• About 10 cups

• About 20 cups

• About 5 cups

• About 1 cup