The Basics of Freshwater

What is essential for all living things to survive?

• Food

• Water

• Shelter

• Air

What is the primary characteristic of saltwater?

• It is found in rivers and lakes

• It has a high concentration of salt

• It is used for drinking by humans

• It is frozen in glaciers

What percentage of the planet's total water supply is freshwater?

• 97 percent

• 50 percent

• 3 percent

• 20 percent

How much of Earth's total water is accessible to humans on the surface?

• Less than 1 percent

• About 3 percent

• About 20 percent

• About 97 percent