Water is lost through the leaves of plants into the atmosphere by which process?

Water is lost through the leaves of plants into the atmosphere by which process?

• A. Evaporation
• B. Transpiration
• C. Condensation
• D. Precipitation

Answer: (B)

Transpiration is the loss of water from plant tissues as water vapor, mainly through the stomata on the leaf surface. Water absorbed by the roots moves up the plant, reaches the leaves, and some of it escapes to the air as vapor. This helps pull more water up the plant via cohesion-tension and also cools the leaf. Evaporation is the general loss of water as vapor from any surface, not just plants. Condensation is vapor turning into liquid, a step in cloud formation. Precipitation is water that falls to the surface as rain, snow, etc.

Transpiration is the loss of water from plant tissues as water vapor, mainly through the stomata on the leaf surface. Water absorbed by the roots moves up the plant, reaches the leaves, and some of it escapes to the air as vapor. This helps pull more water up the plant via cohesion-tension and also cools the leaf.

Evaporation is the general loss of water as vapor from any surface, not just plants. Condensation is vapor turning into liquid, a step in cloud formation. Precipitation is water that falls to the surface as rain, snow, etc.