PLANT LAB YAY

Plant Transpiration Data Table
	Normal	With Fan	With Heater	With Lamp
Arrowhead	3.6 mL	7.5 mL	6.6 mL	4.0 mL
Coleus	0.9 mL	6.0 mL	3.9 mL	3.0 mL
Devil’s Ivy	2.9 mL	4.6 mL	4.1 mL	3.0 mL
Dieffenbachia	4.1 mL	7.7 mL	6.0 mL	3.9 mL
English Ivy	1.8 mL	5.1 mL	3.2 mL	2.1 mL
Geranium	1.2 mL	4.7 mL	5.8 mL	2.4 mL
Rubber Plant	4.9 mL	8.4 mL	6.8 mL	4.3 mL
Weeping Fig	3.3 mL	6.1 mL	4.9 mL	2.5 mL
Zebra Plant	4.2 mL	7.6 mL	6.1 mL	3.2 mL

Question 1: Describe the process of transpiration in vascular plants. The stomata which is found underneath leaves evaporates water. The water in the vascular plant is brought up through the roots through evaporation and cohesion in the xylem. The stomata lets out oxygen and takes in carbon dioxide. 

Question 2: Describe any experimental controls used in the investigation.

The experimental control or also called the control group is the plant transpiration without the fan, heater, or lamp.

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

The fan, heater, and lamp all increased the rate of plant transpiration but for the rubber plant, weeping Fig, and the Zebra plant, the lamp reduced the rate of ttrasnpiration. This means that heat and wind will increase the rate of transpiration but slight heat, probably more solar energy will reduce the rate for some plantss.

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

We found that wind was affected transpiration the most because the water was blown away without even having to evaporate. Heat was the second most importatn factor because it increased the rate of evaporation. 

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

The rubber plant had the highest transpiration rate. This is probably because it had larger leaves and that increases the surface area which allows for more water to be evaporated. The size of leaves is one of the most important thing in determining the rate of transpiration.

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

Answer:The petroleum jelly would cover the stomamata, therefore preventing water from escaping and decreasing the rate of transpiration.

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

Plants need to lose water through transpirati  ground through the xylem.