The video discusses global water resources, highlighting the differences between freshwater and saltwater, and the unique properties of water. It covers ocean circulation, upwelling, and Ekman transport, explaining their roles in climate and nutrient cycles. The advantages of drip irrigation in agriculture are outlined, along with domestic water use and conservation strategies. Global water issues, such as shortages and rising sea levels, are addressed, emphasizing the need for sustainable practices.

What percentage of Earth's water is fresh water?

• 3%

• 10%

• 25%

• 50%

Which property of water allows it to absorb a lot of heat without evaporating?

• Low boiling point

• Weak hydrogen bonds

• High specific heat capacity

• Low density

What is an aquifer?

• A method of irrigation

• A type of ocean current

• A type of glacier

• A geologic formation that contains water

What primarily drives surface ocean currents?

• Salinity differences

• Tidal forces

• Wind patterns

• Earth's rotation

What is the Ekman transport spiral?

• A type of irrigation system

• A process causing nutrient-rich water to rise

• A type of ocean current

• A method of desalination

What is a key advantage of drip irrigation?

• Decreases crop yield

• Reduces salinization

• Requires more energy

• Increases water runoff

Which domestic activity uses the most freshwater?

• Flushing the toilet

• Taking a shower

• Brushing teeth

• Washing dishes

What is a major cause of rising sea levels?

• Increased aquifer recharge

• Increased rainfall

• Decreased ocean salinity

• Thermal expansion of water

Which strategy is NOT mentioned for conserving freshwater?

• Using recycled products

• Building more aquifers

• Drip irrigation

• Desalination

What is a consequence of pollution entering an aquifer?

• Safe drinking water

• Contaminated water supply

• Improved water quality

• Increased water table