Water Potential Lab
Blayne Childers, Luke Wimmer, Lindsey Wimmer
Problem
Will changing light absorption and the temperature of water effect the leafs transpiration in any way.
Hypothesis
If the plant has no light absorption (covered by a box) and is trying to transpire cold water the evaporation will commence at a slow rate.
Manipulated Variable
The manipulated variable is water temperature, and physical lighting. The control will be set up by covering the leaf with the box, and keeping the water cold.
Shade
A box will be covering the leaf, taking away any light absorption.
Water
The water will be chilled and stay at a constant state of coolness.(19 Degrees Fahrenheit).
Leaf
The leaf will not physically be manipulated in any way.
Materials
1. Leaf
2. Ice Water
3. Box (for shading)
4. Water transport tube.
5. Syringe
Manipulated Variable Procedure
The leaf will have no light absorption, by being covered by the box. Because of ice and refrigeration, the leafs water will be much cooler than that of room temperature water.
Control Procedure
Atmosphere does not change in temperature. Leaf is not being physically changed in any way (cut, torn, etc.). No heat or wind will be added to the lab.