This document is an outline for a presentation on transpiration in plants. It defines transpiration as the movement of water through a plant and evaporation from aerial parts, especially leaves. It describes the three main types of transpiration as cuticular, lenticular, and stomatal transpiration. It explains that transpiration allows for diffusion of carbon dioxide for photosynthesis, cools the plant, and enables absorption of minerals and water from the roots to shoots. The outline concludes by noting the next lab will cover mineral nutrition in plants.