The Essential Role Of Fresh Water In Sustaining Life And Ecosystems

The video explores the significance of water, highlighting that humans and Earth are largely composed of water. It details the distribution of Earth's water, with 97.5% being salty ocean water and only 2.5% fresh water. This fresh water is further divided into surface water, ice caps, and ground water. The video emphasizes the importance of ground water for human societies. It also discusses the rising demand for fresh water due to industrialization and population growth, with agriculture consuming 70% of global fresh water, followed by industrial and domestic uses.

What percentage of Earth's water is fresh water?

• 97.5%

• 2.5%

• 75%

• 50%

Which type of fresh water is the smallest in quantity?

• Ocean water

• Ice caps

• Ground water

• Surface water

What percentage of fresh water is stored in ice caps and polar regions?

• 0.3%

• 97.5%

• 70%

• 30%

Why is ground water considered more reliable than surface water?

• It is more visible

• It is more plentiful and easier to access

• It is less polluted

• It is cheaper to extract

What has caused the demand for fresh water to increase in the last century?

• Increased ocean levels

• Decreased rainfall

• Industrialization and population growth

• Deforestation

Which country consumes the most water per capita?

• China

• India

• United States

• Brazil

What sector uses the largest share of global fresh water?

• Agriculture

• Domestic use

• Transportation

• Industrial use

What percentage of fresh water is used for industrial purposes worldwide?

• 8%

• 22%

• 50%

• 70%

Which of the following is NOT a use of industrial water?

• Irrigation

• Fossil fuel extraction

• Manufacturing goods

• Electricity production

What percentage of fresh water is used for domestic purposes?

• 50%

• 8%

• 22%

• 70%