2.54 transpiration

http://www.youtube.com/watch?v=w0Y1llaghwc

- water turns from liquid to gas using heat from sunlight
- the evaporation is through the stomatal pores
- sunlight goes into the chloroplast for photosythesis, this will generate heat
- water is being delivered from the xylem, moves through the spongy layer
- just below the stomatal pore is where the liquid turns to gas
- water vapour diffuses into the outside atmostphere, which is a steep diffusion gradient