Effect of electricity on plant growth
The materials required for this science fair project:
- 1 packet of radish seeds
- 2 plastic pots
- 2 copper rods
- Soil required for the 2 pots
- A DC 9V battery
- A pair of crocodile clips
- Tap water
- Ruler (1 meter)
1. For this science project, the independent variable is the amount of electrical stimulation given to the plants. The dependent variable is the height of the radish plant. This is determined by measuring the height of the 10 plants in each group and calculating their average height. The constants (control variables) are the amount of water used, the amount of sunlight received and the type of plants used.
2. Two pots are labeled A and B. The same amount of soil is filled into both the pots. Ten radish seeds are then planted in each of the pots. (More than 10 radish seeds can be planted and the extra seeds that germinate can be removed later). The radish seeds that are planted in the same pot should be placed at least 20mm apart from one another.
3. Two copper rods are planted in the soil of the pot labeled A. The copper rods should be placed at opposite sides of the pot and should not touch each other. The DC9V battery will be connected to the copper rods for 5 minutes everyday for the next 3 weeks.
4. Both pots are provided with the same amount of water twice a day. The pots are also placed in a location where they can receive the same amount of sunlight.
5. The height of the plants is measured once a week and their average height is calculated and recorded in the table given below.
Be careful when handling batteries and electric currents. Adult supervision recommended