Transpiration lab AP Biology, finding rate of transpiration?

Question

Okay, so I REALLY need help on this because my partners are impossible and don't know what they're doing.

My lab says to calculate the rate of transpiration/surface area for each variable (plant). it says to do ml of water loss/surface area in cm2

We placed 4 pansies in 4 different environments; heat, control, humidity, wind. I'll give you the info for the wind plant.
Day 1(Initial): 82.3 g    Day 2: 73.3 g     Day 3: 64.2 g    Day 4: 54.3 g

I'm completely confused as to how i find the ml of water loss. I have to find the rate of transpiration for each day. so at 24 hours 48 hours and 72 hours. Thanks for any of the help you guys can give me!

? · Accepted Answer

The difference between the earlier mass and the later mass is the mass of water lost.

 82.3 g - 73.3g = 9 grams lost on Day 1 
73.3 - 64.2g = 9.1 grams lost on Day 2.
64.2 - 54.3 = 8.9 grams lost on Day 3. 

The density of water is about  1.0g/ml so 9 ml was lost on the first day, 9.1 ml was lost on the second day and 8.9 ml was lost on the third day. 

The rate of transpiration is 9ml/day. We need to divide this by the surface area of the plant to get our final number.

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Transpiration Lab

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Transpiration lab AP Biology, finding rate of transpiration?
Okay, so I REALLY need help on this because my partners are impossible and don&#39;t know what they&#39;re doing.

My lab says to calculate the rate of transpiration/surface area for each variable (plant). it says to do ml of water loss/surface area in cm2

We placed 4 pansies in 4 different...

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Transpiration lab AP Biology, finding rate of transpiration?

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