3 Shades of Transpiration

Jason Arrezola, Kelby Miller, Sadie Wheeler, Destiny Winn

Problem

Will the color black placed in front of a light affect the transpiration of the leaf in the experiment?

Hypothesis

If a black cover is placed in front of a light then it will make the transpiration process slower.

Constant Factors

Time

Light

Water

Materials

Leaf

Water

Syringe

Light

Black Cover

Manipulated Variable Procedure

Using the black covers we will be able to determine whether the color will effect the transpiration of the leaf.

Observation

During this lab we observed that it took about three minutes for a change to be evident in the experiment. Once the initial change started to occur it became evident that the slight shade we had manipulated was affecting the transpiration that was occurring.

Data

MV: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10

Cold Water: 3.75 - 3.5 - 3.5 - 3.5 - 3.45 - 3.45 - 3.25 - 3.15 - 3 - 3

Apple Juice: 5.5 - 5.46 - 5.46 - 5.45 - 5.45 - 5.43 - 5.41 - 5.41 - 5.4 - 5.4

Ammonia: 4.8 - 4.8 - 4.8 - 4.8 - 4.8 - 4.8 - 4.8 - 4.8 - 4.8 - 4.8

Sugar: 6.2 - 6.2 - 6.2 - 6.2 - 6.2 - 6.2 - 6.2 - 6.2 - 6.2 - 6.2

Light: 1.2 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1

Shade: 5.2 - 5.2 - 5.1 - 4.9 - 4.8 - 4.8 - 4.8 - 4.7 - 4.7 - 4.5

Control: 2.8 - 2.8 - 2.7 - 2.7 - 2.6 - 2.5 - 2.3 - 2.3 - 2.2 - 2

Area of Leaf: 678

Transpiration Rate:

Cold Water: 1.22 x 10e-4

Apple Juice: 1.40 x 10e-9

Ammonia: 0

Sugar: 0

Light: 5.3 x 10e-6

Shade: 1.13 x10 e-6

Control: 4.9 x 10e-5

Analysis

mL/mm^2/min

5.2/678^2 /10

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Conclusion

By doing this experiment we were able to come to the conclusion that shade has the potential to cause a change in transpiration, but in the time given made a slight if any difference in the outcome.