Title: Growth Rate of Sunflowers
Introduction:
This is a experiment about how fast sunflowers grow.
Question:
How fast do sunflowers grow?
Hypothesis:
I think that in five weeks the subflowers will have full flower.
Experiment:
I planted a crop of sunflowers. Each day I kept track of the sunflowers. I measured with a ruler how tall they grow. I chose three out of a crop of sunflowers. I don’t know exactly how many plants there where in a crop.
Equipment Used:
- sunflower seeds
- planters
- potting mix
- tape measure
- ruler
- lots of water and sunshine
Results:
| HEIGHT (cm) | ||||
|---|---|---|---|---|
| DATE | PLANT 1 | PLANT 2 | PLANT 3 | Notes |
| 5/22/2006 | 0.0 | 0.0 | 0.0 | Planted |
| 5/30/2006 | 0.0 | 2.0 | 1.5 | – |
| 6/7/2006 | 5.0 | 12.0 | 15.5 | – |
| 6/14/2006 | 16.5 | 21.0 | 23.0 | – |
| 6/21/2006 | 36.0 | 43.0 | 45.0 | – |
| 6/29/2006 | 70.0 | 71.0 | 87.0 | – |
| 7/7/2006 | 92.0 | 92.0 | 98.0 | – |
| 7/18/2006 | 110.0 | 123.0 | 123.0 | – |
| 8/5/2006 | 145.0 | 159.0 | 165.0 | – |
| 8/11/2006 | 150.0 | 183.0 | 281.0 | Flowers blooming… |
Average = 204.7 cm of all plants
Growth Rate = 18.6 cm per week (7.3 inches per week)
What I Learned (Conclusion):
I learned that sunflowers can bloom in two months. And also at a rate of 7.3 inches per week. Other factors affect the growth rate of sunflower.
16 Jun 2006
This science project will be submitted to the Escondido Science Fair in 2008.