Independent Variable
Dependent Variable
Method for measuring changes in D.V.
Control Group
Constants
Number of trials
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The type of solution (just water and water with sodium bicarbonate) in which the leaf discs are placed is the independent variable.
The amount of disks that float to the surface is the dependent variable.
Each minute of the experiment, count how many leaf disks have floated to the top to measure the dependent variable.
The water solution without sodium bicarbonate is the control group.
The amount of leaf disks, the amount of water, the amount of soap and the beaker size are the constants in this experiment.
Only one trial was conducted.
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Time in minutes:
1 2 3 4 5 6 7 8 9 10 |
Beaker #1 (Water only)
0 0 0 0 0 0 0 0 0 0 |
Beaker #2 (Water and sodium bicarbonate)
0 0 0 0 0 1 1 3 3 5 |