- Transporation is the evaporation of water from the surface of the plant.

- Water evaporates to a gas because of the heat provided by the sunlight which is absorbed by the structure of the leaf

- Evaporation occurs through the stomatal pores

- Water delivered to the leaf from the xylem.

- In the spongy layer, there is a phase change

- The water vapor diffuses down the diffusion gradient and then through the stomatal pore