Understanding Freshwater on Earth

The video explores Earth's water distribution, highlighting that over 70% of the surface is water, with less than 3% being freshwater. It explains the water cycle's role in replenishing freshwater and emphasizes the importance of conserving this vital resource. Freshwater is crucial for life and various Earth processes, despite its limited availability. The video encourages sustainable water use and highlights individual and collective efforts to conserve water.

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

• 60%

• 50%

• 80%

• 70%

What fraction of Earth's water is freshwater?

• More than 10%

• Less than 1%

• About 5%

• Less than 3%

Where can we find most of the accessible freshwater on Earth?

• Glaciers

• Oceans

• Atmosphere

• Rivers and lakes

How does the water cycle contribute to freshwater availability?

• By storing water in oceans

• Through volcanic activity

• Through evaporation and precipitation

• By freezing water in glaciers

What happens to salt during the evaporation of ocean water?

• It evaporates with the water

• It remains in the ocean

• It forms clouds

• It turns into freshwater

Why is freshwater essential for most living organisms?

• Most organisms cannot process saltwater

• It is easily accessible

• It is abundant in oceans

• It contains high salt content

How does freshwater help regulate Earth's temperature?

• By reflecting heat from ice caps

• By absorbing heat

• By increasing ocean levels

• By causing droughts

What is one way individuals can help conserve freshwater?

• Using more water in agriculture

• Fixing leaks

• Leaving faucets running

• Taking longer showers

How much water can one person save annually by turning off the faucet while brushing teeth?

• 4,000 gallons

• 3,000 gallons

• 2,000 gallons

• 1,000 gallons

What role do companies play in water conservation?

• Promoting saltwater use

• Ignoring water issues

• Reducing water in manufacturing

• Increasing water usage