Transpiration Lab

3.6	7.5	6.6	4.0
0.9	6.0	3.9	3.0
2.9	4.6	4.1	3.0
4.1	7.7	6.0	3.9
1.8	5.1	3.2	2.1
1.2	4.7	5.8	2.4
4.9	8.4	6.8	4.3
3.3	6.1	4.9	2.5
4.2	7.6	6.1	3.2

This is the data table for the plant transpiration lab in which we looked at how much plants transpire based on the temperature.  

1. Describe the process of transpiration in vascular plants.

Water in the form of  a gas leaves the leaves via the stomata and adheres to the plant turning back into a liquid.

2. Describe any experimental controls used in the Investigation.

The temperature change caused by the fan, heater, and lamp were all experimental controls.

3. What environmental factors that you tested increased the rate of transpiration? Was the rate of transpiration increased for all plants tested?

An increase in wind caused greater transpiration in all plants.

4. Did any of the environmental factors (heat, light, or wind) increase the transpiration rate more than the others? Why?

The wind caused the greatest increase in transpiration because it pushed the water molecules back onto the outside of the plant after they had left the leaves.

5. Which species of plants that you tested had the highest transpiration rates? Why do you think different species of plants transpire at different rates?

Different species of plants have different transpiration rates because of what types of plants they are (C4 C3 CAM). The difference found in C3 plants is caused by how large their stomata is.

6. Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected?

They would barely transpire at all because the jelly would clog the stomata so no water would escape

7. Of what value to a plant is the ability to lose water through transpiration?

This way the plant does not burst it's cells in a wet season.