Water Properties and Usage

The video explores the abundance and distribution of water on Earth, highlighting that 71% of the Earth's surface is water, with most of it in oceans. It discusses the importance of water for life and space exploration, the phases of water, and its physical properties. The video also covers global water usage, availability, and water chemistry, including its pH and surface tension. Finally, it emphasizes water's phase changes and its critical role in sustaining life.

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

• 50%

• 96%

• 71%

• 85%

Where is the majority of the Earth's fresh water stored?

• Oceans

• Rivers

• Atmosphere

• Glaciers

Which of the following is NOT a phase of water?

• Liquid

• Solid

• Plasma

• Gas

Why are dams built wider at the base than at the top?

• To reduce evaporation

• To allow more fish to pass

• To resist greater forces at depth

• To store more water

How much water does the average person in America use per day?

• 120 gallons

• 90 gallons

• 60 gallons

• 30 gallons

Which location holds the record for the most rainfall?

• Sahara Desert

• Amazon Rainforest

• Mautin Ram, India

• McMurdo Dry Valleys, Antarctica

What is the pH level of water in its natural state?

• 6

• 7

• 8

• 5

Which element is NOT a part of water's chemical composition?

• Hydrogen

• None of the above

• Oxygen

• Nitrogen

What property of water allows bugs to float on its surface?

• Low pH

• Low density

• High surface tension

• High viscosity

At what temperature does water boil in Celsius?

• 150°C

• 100°C

• 50°C

• 0°C