Understanding Water Resources

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

• 85%

• 60%

• 50%

• 71%

Which of the following is the largest source of fresh water on Earth?

• Atmospheric water vapor

• Rivers

• Lakes

• Glaciers and ice caps

What is desalination?

• Desalination is the process of converting seawater into fresh water by removing salt and impurities.

• Desalination is a method of purifying air for drinking.

• Desalination is the process of adding salt to fresh water.

• Desalination refers to the extraction of oil from seawater.

Which of the following is NOT a method of sustainable water management?

• Excessive groundwater extraction

• Drip irrigation

• Rainwater harvesting

• Constructed wetlands

What is the main purpose of water management?

• To reduce the availability of water resources.

• The main purpose of water management is to ensure sustainable and efficient use of water resources.

• To promote water pollution.

• To increase water consumption rates.

Which of the following is a benefit of rainwater harvesting?

• Increases groundwater depletion

• Reduces stormwater runoff

• Increases water pollution

• Requires extensive infrastructure

What is the primary cause of water scarcity in many regions?

• Overpopulation

• Excessive rainfall

• High levels of groundwater

• Increased water conservation efforts

Which of the following practices can help improve water quality?

• Using chemical fertilizers

• Implementing buffer zones

• Discharging untreated wastewater

• Clearing vegetation near water bodies