A Biological Question - Which fertilizer is better: brand A or brand B?
My Hypothesis: brand B, because I have seen it advertised on TV.
The Experiment:
· Use 3 identical plants.
· Give water to each plant equally on Fridays.
· Plant 1 will just get water.
· Plant 2 will get water with fertilizer A added.
· Plant 3 will get water with fertilizer B added.
· Measure the height of each plant (in centimeters) on Mondays.
· Run the experiment for 2 months.
· At the end of the experiment, the best fertilizer will produce the tallest plant.
The Data
|
Week |
Plant # 1 - cm |
Plant # 2 - cm |
Plant # 3 - cm |
|
1 |
12 |
12 |
12 |
|
2 |
12 |
13 |
12 |
|
3 |
13 |
14 |
13 |
|
4 |
13 |
15 |
13 |
|
5 |
14 |
16 |
14 |
|
6 |
14 |
16 |
15 |
|
7 |
15 |
16 |
16 |
|
8 |
15 |
16 |
17 |
1. Graph the data.
2. What is the control in this experiment?
3. What is the independent variable?
4. What is the dependent variable?
5. What conclusions could be reached from the data?
6. Do you see any problems with the experiment?
7. What changes in the procedures would you make?