Key findings
1. The seeds did not grow properly in cotton buds which can be seen from the results in experiment 1. Only the seeds in tap water and sugar water germinated on day 2. The rest did not germinate. We did not water the seeds with the different types of water yet since it was decided that the plants will be only watered with the respective kind of water after they have germinated and grown to at least a height of 3 cm.
2. For the 2nd experiment, soil was used since the plants did not grow properly in cotton buds. The seeds germinated on the 2nd day and the roots grew on the 3rd day. On the 4th day, all the plants grew to a height of 5 cm to 7 cm. After watering the plants with the respective type of water, the plants that were watered with salt and detergent water died the next day. The plants that were watered with tap water grew to a height of 13 cm to 14 cm. The plants that were watered with sugar water remained the same height. On Day 6, the plants that were watered with tap water grew to a height of 16 cm. While the plants that were watered with sugar water remained the same height. But the plants that were watered with sugar water were rotting. On Day 7, the plants that were watered with tap water grew to a height of 18 cm. While the plants that were watered with sugar water remained the same height and was rotting. On Day 8 which was the last day of the experiment, the plants that were watered with tap water grew to a height of 19 cm to 20 cm. The plants that were watered with sugar water rotted and died.
3. For the 3rd experiment, the plants germinated on the 2nd day and the roots grew on the 3rd day. On the 4th day, all the plants grew to a height of 6 cm to 7 cm. After watering the plants with the respective type of water, the plants that were watered with salt and detergent water died the next day. The plants that were watered with tap water grew to a height of 13 cm to 14 cm. The plants that were watered with sugar water remained the same height. On Day 6, the plants that were watered with tap water grew to a height of 16 cm. While the plants that were watered with sugar water remained the same height. On Day 7, the plants that were watered with tap water grew to a height of 17 cm to 18 cm. While the plants that were watered with sugar water died.
On Day 8 which was the last day of the experiment, the plants that were watered with tap water grew to a height of 20 cm.
Explanation of key findings
The explanation for the plants growing better in tap water than the others is because
tap water does not have additional minerals, while the salt water has Sodium (Na) and
Chlorine (Cl) in it combined with water, the detergent water has 17.2-60.1, 11.1-40.1,
2.5-32.3, 8.1-10.5, 7.2-21.6, 9.8-17.9, 1.7-3.8, 12.5-22.5, and 2.0-5.8 μg/g for iron,
manganese, zinc, copper, lead, cobalt, cadmium, nickel, and chromium, respectively,
combined with the tap water and the sugar water contains 12 carbon atoms, 22
hydrogen atoms, and 11 oxygen atoms.
Evaluation of hypothesis
From the three experiments and according to the results as shown above tap water was the best type of water for plants to be watered with.
This has proved that the hypothesis that was made is correct.
Areas for improvements
The possible area of improvement is that the group could have used more samples of other plants to further test the effectiveness of the other samples of water to specific types of plants, the group also could have used a more wider variety of water , to further test the effectiveness of those waters to help the green beans grow better.
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