more transpiration. During extreme winter plants shed all their leaves and will go to the dormant stage. Evergreen plants have needle like leaf structure to minimize water loss. The waxy coating on the leaf is an additional layer to reduce the water loss.
Experiment 1: Functionality of the Water Column Drawings Include your drawings here: Post-Lab Questions 1. How far did the dye travel in the celery which was submerged in water for 15 minutes? To the tip of the celery stalk. How far did it travel in the piece which was air-dried for 15 minutes? No movement. 2. In which celery stalk was the water column broken? The water column was broken in the stalk that was air-dried for 15 minutes.
Experiment 2: Water Movement in Flowers Post-Lab Questions 1. In which part of the flower is the dye located? How did it get there? The dye is located in the petals of the flower. The dye moved up the stem through the process of transpiration. 2. What factors can influence the rate of transpiration in flowers? Water, wind, light, hu- midity, and temperature are factors that can influence the rate of transpiration in flowers.
Experiment 3: Transpiration Post-Lab Questions 1. Was the water volume in the test tubes more or less after the two-hour period than it was at the beginning of the experiment? If there was a difference in either of the test tubes, what caused this change? The water volume in the test tubes was less after the two- hour period than it was at the beginning of the experiment because the sodium polyacrylate absorbed most of the water. 2. Did this amount vary between the test tube with the fan blowing on it and the test tube without the fan? If there was a difference, what caused this change? When the fan was blowing on the test tube the water began to absorb the sodium polyacrylate but the amount did not vary by much. 3. What does the sodium polyacrylate represent in real plants? The sodium polyacrylate represents the roots in real plants.
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- Fall '19
- leafs, water column, Conduction of Water