Water Cycle and Freshwater Concepts

The video explains that 71% of Earth's surface is covered by water, with 97% being saltwater and 3% freshwater. It introduces the water cycle, a continuous process involving evaporation, condensation, and precipitation. Water evaporates from oceans, lakes, and plants, forming clouds through condensation. These clouds eventually lead to precipitation, returning water to Earth's surface. The cycle ensures a constant supply of water, despite continuous usage. The video aims to help viewers understand the water cycle's stages and significance.

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

• 50%

• 71%

• 85%

• 97%

What percentage of the Earth's water is freshwater?

• 3%

• 10%

• 25%

• 50%

Where is the majority of the Earth's freshwater found?

• Lakes

• Rivers

• Underground

• Polar ice caps

What is the term for the continuous movement of water from the Earth to the atmosphere and back?

• Water cycle

• Evaporation

• Condensation

• Precipitation

What is the process called when water from plants is released into the atmosphere?

• Precipitation

• Condensation

• Transpiration

• Evaporation

What is the term for the process where water vapor turns into liquid water?

• Evaporation

• Transpiration

• Condensation

• Precipitation

What is the process called when water vapor forms clouds?

• Transpiration

• Precipitation

• Evaporation

• Condensation

What is the term for the process where water falls from clouds as rain?

• Precipitation

• Condensation

• Transpiration

• Evaporation

What happens to water after it falls as rain?

• It flows to low-lying areas

• It disappears

• It stays in the clouds

• It evaporates immediately

What ensures that the water on Earth does not run out despite continuous use?

• New water is created

• Water is imported from space

• Water is never used

• The water cycle