Purpose:To examine the rate of respiration of plant and the loss of evaporation through the process of transpiration.Theory:Transpiration is the process where water is carried through the plants roots, therefore changing to vapor as it is let out into the atmosphere. It is the evaporation of water through the stomata. The stomata are mainly concerned with exchange of gases during the process of photosynthesis and respiration. Water/moisture evaporates from leafs surface, moves from an area of high water potential to an area of low water potential. There are many factors that deal with the rate of transpiration. One factor is as the transpiration rate goes up the temperature surrounding the plant increases. Another factor being, as the humidity of the surrounding air of the plant rises transpiration rate falls, water evaporates more readily in dry air rather than saturated air. The specific type of plant and area of growthvary in the rate of respiration.Materials/apparatus:Procedure:Step 1Using a sharpened razor blade cut the plant in diagonal pieces.Step 2Determine the surface area of the leaf by tracing it onto a piece of grid paper. Place the in water when it is not being used.Step 3Attach clamps to a clamp stand.Step 4Place a calibrated pipette inside of a small black tube, then place the black tube into one end of the long clear tube.Step 5Place a white tunnel on the end of a clear tube, place the plant through it, the roots must show/be visible from the long clear tube.Step 6Stabilize the plant by wrapping a clear stretchy paper around the funnel and the plant.Step 7Using distilled water add it through the calibrated pipette and fill up to the top.Step 8Place each potometer in a variety of environments being, room conditions, mist, wind, and bright light.