The Hydrosphere: Exploring Earth's Abundance of Water

The video discusses Earth's hydrosphere, highlighting its significance as a water-rich planet. It explains the various forms of water—solid, liquid, and gas—and their distribution on Earth. With 71% of Earth's surface covered by water, only a small fraction is freshwater, suitable for drinking. The video emphasizes the importance of conserving water, citing the famous line from 'Rime of the Ancient Mariner.' It concludes by underscoring water's crucial role in sustaining life, noting that it constitutes about 70% of the human body and is essential for survival.

Why is Earth often referred to as the 'blue planet'?

• Because it is the largest planet in the solar system

• Due to its vast coverage of water

• Due to its proximity to the sun

• Because it has the most diverse life forms

In which forms can water be found on Earth?

• Only gas

• Only solid and liquid

• Only liquid and gas

• Solid, liquid, and gas

What percentage of Earth's water is considered fresh water?

• 97%

• 3%

• 50%

• 71%

Why is it important to conserve water on Earth?

• Because all water is drinkable

• Because fresh water is abundant

• Because only a small portion of Earth's water is drinkable

• Because water is not essential for life

What percentage of a human's body weight is made up of water?

• 50%

• 30%

• 70%

• 90%