Hydroponics vs. soil growth
The materials required for this science fair project are:
- 1 Peperomia plant
- 10 plastic containers
- 5 plastic containers filled with soil
- 1 bottle of hydroponic plant food
- 1 pair of scissors
- Tap water
- 1 ruler
- 1 black marker pen
1. The independent variable in this science fair project is the method of cultivation – whether the plant is grown in soil, or hydroponically. . The dependent variable is the length of the plant’s roots after 3 weeks. This is determined by measuring the length of the roots using a ruler. The constants (control variables) are the amount of soil or nutrient solution, the type of plant, the length of the stem, the length of time allocated for the experiment and the amount of sunlight received by the plants.
2. Cut 10 pieces of the Peperomia plant stem into 8 cm lengths.
3. Label the 5 plastic containers “soil 1” to “soil 5”. Label the other 5 plastic containers “hydro 1” to “hydro 5”.
4. Make 3 holes at the bottom of the plastic containers marked “soil 1” to “soil 5”. Fill these containers with soil. Plant 1 Peperomia plant stem in each of the container. Water the containers daily with 50ml of water.
5. Mix the hydroponics plant nutrient is with water according to the instructions stated on the packaging. Pour the mixture into the plastic containers marked “hydro 1” to “hydro 5”. Place 1 Peperomia plant stem in each of the container.
6. Place the 10 plastic containers at a place where there is adequate sunlight.
7. Remove the plant stems from their respective containers after 3 weeks,. Measure the length of their roots Record the measurements in the table provided below.
Basic safety requirements