6.4 Water Resources

What percentage of Earth's water is freshwater?

• 97%

• 50%

• 3%

• 10%

Which type of water is found below Earth’s surface in rocks and soil?

• Surface water

• Groundwater

• Saltwater

• Atmospheric water

Why is desalination an important process for some regions?

• It removes minerals to make water more nutritious.

• It converts saltwater into freshwater for areas with limited freshwater resources.

• It increases the salt content in water for industrial use.

• It prevents pollution in surface water.

What factor primarily affects the distribution of groundwater?

• Temperature

• Type of rock in Earth’s crust

• Amount of rainfall

• Distance from oceans

Which of the following is a major cause of water scarcity?

• Excessive rainfall

• Overuse of water resources

• Increase in glacier ice

• Excessive desalination

Most accessible freshwater is found in which of the following locations?

• Oceans

• Ice caps and glaciers

• Lakes and rivers

• Groundwater

How does human activity impact groundwater supplies?

• It helps replenish aquifers.

• It speeds up the natural water cycle.

• It often depletes groundwater faster than it can be replenished.

• It increases the flow of water from rivers to groundwater.

What is an aquifer?

• A. A body of water found only in lakes

• B. A layer of porous rock that stores groundwater

• C. A type of plant that grows near water sources

• D. A process used to remove salt from water

Why is surface water easier for humans to use than groundwater?

• Surface water is located in more remote areas.

• Surface water is more widely distributed across the Earth.

• Surface water is easier to access as it is found in lakes, rivers, and reservoirs.

• Surface water requires more technological resources to be accessed.

Which of the following is a sustainable practice for managing ocean resources?

• Increasing desalination to remove all salt from the ocean

• Overfishing to maintain a consistent supply of fish

• Designing fishing nets that allow smaller fish to escape

• Building dams on rivers near the ocean