- When sunlight falls on a leaf, its radiant energy excites the water molecules in the leaf.
- The H2O molecules heat up, and they start bouncing around and eventually come up to the surface of the leaf.
- When they absorb even more energy, bonds between adjacent H2O molecules break, turn into water vapor and evaporate into the atmosphere.
Monday, December 17, 2012
Transpiration: How do plants release water into the air?
This is how transpiration happens: