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NaCl Ready for Race Day. Icy Cold: Will it slow down?. Hypothesis : Salt water will not travel as far through the stalk of celery as the control. Hypothesis: Ice water will move more slowly through the stalk of celery than Distilled water. Design of Experiment:

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NaCl Ready for Race Day

Icy Cold: Will it slow down?

Hypothesis :

Salt water will not travel as far through the stalk of celery as the control.

Hypothesis:

Ice water will move more slowly through the stalk of celery than Distilled water.

Design of Experiment:

Controlled Variables: Independent Variable:

*amount of water (15 mL) *Solution Composition (NaCl)

*amount of dye

*amount of light Dependent Variable:

*length of celery (24 cm.) *Distance dye moves through celery

Design of Experiment:

Controlled Variables: Independent Variable:

*amount of water (15 mL) *Water Temperature (O°C)

*amount of dye

*amount of light Dependent Variable:

*length of celery (24 cm.) *Distance dye moves through celery

Question:

When I change the temperature of the water, will the length of transpiration vary?

Question:

When I change the composition of the water solution, will the length of transpiration vary?

Transpiration: Ready, Set, Transpire!!Stacy Cunningham, Christy Crammer, and Aline RodriguezAllentown School District

NaCl water

(Independent Variable)

Ice water

(Independent Variable)

Distilled water

(Control)

Distilled water

(Control)

Set up of Experiment:

Independent Variable: Put ice in 150 mL of water with red dye until water reaches 0°C

Control: 150 mL of water with red dye with celery

Place on window sill

Set up of Experiment:

Independent Variable: Put 4 Tbsp of NaCl in 150 mL of water with red dye

Control: 150 mL of water with red dye with celery

Place on window sill

Results:

The rate of transpiration in the NaCl celery was considerably less than in the control water. The water moved on 2.2 cm up the length of the celery in the salt water, whereas it moved up the celery in water to the top, 24 cm.

Results:

The rate of transpiration in the Ice Water celery was equal to the rate of transpiration in the control water. The water moved 24 cm up the length of both pieces of celery.

However, what was not measured but noted the speed at which the dye moved up the celery was considerably slower in the ice water than in the control room temperature water.

NaCl water

(Independent Variable)

Ice water

(Independent Variable)

Distilled water

(Control)

Distilled water

(Control)

Conclusions:

And the winner is:

Transpiration will occur faster using room temperature water. With ice water running a close second in the race of transpiration. Pulling up the end of the race with a weak finish, is NaCl water!!

NaCl Ice Control

Ice Water

Room Temperature water

NaCl Water