Stoma density and water loss
- The graph below represents the results of our science project experiment:4 large beakers
- 1 measuring cylinder
- Tap water
- 1 ivy plant
- 1 money plant
- 1 elephant ear plant
(The size of the ivy plant, money plant and elephant plant should be almost same)
1. For this science project, the independent variable is the type of plant used – the ivy (Hedera), money plant (Epipremnum aureum) and elephant ear plant (a member of the Caladium family). The dependent variable is the amount of water lost from the beaker through evaporation and transpiration. This is determined by using the measuring cylinder to measure the water after 5 days. The constants (control variables) are the size of the plants, the size of the beaker, the amount of water in the beaker, the room temperature, wind in the room and the amount of sunlight received by the plants.
2. The ivy, money plant and elephant ear plant are removed from the soil and the roots are washed under the tap water to remove all the soil and dirt.
3. Four beakers are filled with 100ml of tap water each. The water is measured using the measuring cylinder. The 3 plants are placed inside each of the beakers. The fourth beaker will be the control without any plant.
4. The 4 beakers are placed in a location where they will receive the same amount of sunlight. The plants will be observed for 5 days. On the fifth day, the amount of water remaining in the beakers is measured using the measuring cylinder. The amount of water lost through transpiration and evaporation is recorded in the table given below.
Basic safety requirements