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Does Gravity Have An Affect On Plant Growth?
by   Sarah   H.
* Hypothesis * Abstract * Materials * Procedure * Results * Conclusion * Bibliography & Links * 
 
Hypothesis 
My hypothesis is: I think gravity does have an effect on plant growth on plants. I think that becausse the roots of a plant always go down  and the stem of a plant always go  up.
Abstract 
I was trying to find out Does Gravity Have An Effect On Plant Growth? I wanted to know that because plants donít have many so I  wondered if gravity makes the roots of a plant to go down and the stems to go up.
Materials   
  • Chick-peas 
  • Small cup or jar with straight sides 
  • Water 
  • Refrigerator  
  • Paper towel  
  • 8 by 12-inch piece of aluminum foil 
  • Marker 
  • Tape (if necessary) 
Procedure   
1. I placed the beans in a bowl of I filled the bowl with water and stored the beans in the refrigerator overnight. 
2. After one dat I emptied the water. I carefully put the beans on to a folded paper towel. 
3.I rolled the paper towel up. 
4.I moistened the paper  towel a little. 
5.I wrapped the aluminum foil around the paper towel and folded the ends. 
6.I placed the roll into a cup. Then I left  it there for 5 days. 
7. Then i carefully opened the roll and observed what had happened. 
8.I moistened the paper and closed the roll. 
9.I left the roll alone for five days. This time I turned the roll up-side-down. 
10. I opened the roll up one last time and observed what had happened. 
 
Results   
After 5 days the bean sprout roots started  growing down and the stem up. Flipping the roll made the beans do a 180-degree turn, but again the roots started to go down and the stems up. 
Conclusion 
My hypothesis was correct, as proven above experiment. I  further researched the reason why gravity has this on plants by reading articles in books. I discover that Geotropism is the movement of a plant due to the pull of gravity. 
 
Bibliography & Links   
  • 1. VanCleave J. Gravity Experiment You Can Turn Into Science Fair Projects. Canada:John Wiley &Sons Inc. 1993. 
  • 2. "Chick Peas." Encyclopedia Encarta Microsoft. 1993. 
  • 3. "Plant Hormones." Encyclopedia World Book.( volume H ). 
  • 4. Branley, M. Franklyn. Gravity Is A Mystery. New York: Thomas, Y. Crowell.1986.
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Sarah H.
Timber Ridge Magnet School