Ap biology plant transpiration lab
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Paul Andersen starts by defining tr7. Create a data table to record the weight of your plants for the next 4 days. Be sure to incvlude all labels and a section for original weight. Create a section of your table for making qualitative observations each day. The control group will stay relatively the same and lose a little water. The group exposed to the light will lose the most weight. The humidity group has a bag over the plant so the water will not be able to escape. The fan will dry out the leaves.
The independent variable is the location of the plant (the light, fan, humidity, and control). The dependent variable is how much water weight the plant lost after four days exposed to the independent variable. Water potentials plays a role in the movement of water from soil through the plant and into the air becuase the water potential has to be higher inside plants. This means that the water inside the plant is more likelyPaul Andersen starts by defining transpiration as evaporation off of a leaf.
It is instead lost through transpiration, the evaporation of waterthrough the leaf surface and stomata, and through guttation, which is the lossof water from the vascular tissues in the margins of leaves.There are three levels of transport in plants: uptake and release of waterand solutes by individual cells, short distance cell to cell transport at tissueand organ levels, and long distance transport of sap by xylem and phloem at thewhole plant level. The transport of water is controlled by water potential.Water will always move from an area of high water potential to an area with lowwater potential.
This water potential is affected by pressure, gravity, andsolute concentration.Water moves into the plant through osmosis and creates a hydrostatic rootpressure that forces the water upwardOur Prediction: After four days the plant in the light condition will have transpired the m ost water. This will happen because this plant is getting the most light so it will be carrying out the process of photosynthesis the most, which uses water. The plant that will transpire the least amount will be the plant in the dark condition for the same reason.
This transpiration lab had four mainobjectives. The first objective was to understand the role oftranspiration in the transport of water within a plant. The second wasto understand the structures used by plants to transport water andregulate water movement. The third was to test the effects ofenvironmental variables on rates of transpiration using a controlled experiment.The fourth objective was to understand how leaf anatomy andphotosynthesis relate to the process of transpiration in vascularplants.
By understanding these objective wes.