Water's Journey Through Earth's Atmosphere and Its Sources

Harold York, a research scientist, explains how water enters Earth's atmosphere. The atmosphere contains about 13 trillion metric tons of water, which is only a small fraction of Earth's total water. The primary sources of atmospheric water are evaporation from bodies of water and transpiration from plants. Other minor sources include sublimation and steam from volcanoes and geysers. The video concludes with a summary of these processes.

Who is the speaker in the video and what is his profession?

• Alice Brown, a geologist

• Harold York, a research scientist

• John Doe, a meteorologist

• Jane Smith, a climate expert

How much water does the Earth's atmosphere contain at any given time?

• 13 billion metric tons

• 1 billion metric tons

• 13 trillion metric tons

• 1 trillion metric tons

What percentage of the Earth's total water is found in the atmosphere?

• 1%

• 0.1%

• 0.01%

• 0.001%

What is the primary source of water in the Earth's atmosphere?

• Volcanic steam

• Sublimation

• Transpiration

• Evaporation

What percentage of atmospheric water comes from evaporation?

• 100%

• 50%

• 70%

• 90%

What process involves plants releasing water into the atmosphere?

• Condensation

• Evaporation

• Transpiration

• Sublimation

How much water does a large oak tree transpire annually?

• 10,000 gallons

• 20,000 gallons

• 40,000 gallons

• 30,000 gallons

Which of the following is a negligible source of atmospheric water?

• Sublimation

• Transpiration

• Volcanic steam

• Evaporation

What are the two principal sources of water in the Earth's atmosphere?

• Evaporation and sublimation

• Transpiration and volcanic steam

• Evaporation and transpiration

• Sublimation and condensation