| Explore | How does the temperature of water affect the plant's growth? How does the amount of light affect plants? How does the salinity of water affect the plant's germination? We learned that the water with more salinity hasn't caused the seeds to germinate at all. We also learned that the lower amounts of salt were the best for the seeds. |
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| Research Question | How does the salinity water affect the plant's germination? |
| Predictions | If there is more salinity in water then the plant is going to germanate slower. This is because salt dissolves in water. |
| Experimental Design | 1.Collect materials 2.Place paper towel in 4 Petri dishes 3.Place five radish seeds on top of a paper towel in container 4.In measuring cup 1 mix 250 milliliters of water with 0 grams of salt (measure 25 milliliters of water to use) 5.In measuring cup 2 mix 250 milliliters of water with 0.125 grams of salt (measure 25 milliliters of water to use) 6.In measuring cup 3 mix 250 milliliters of water with 0.25 grams of salt (measure 25 milliliters of water to use) 7.In measuring cup 4 mix 250 milliliters of water with 8.75 grams salt (measure 25 milliliters of water to use) 8.Pour measuring cups 1-4 in different Petri dishes and put the lid on 9.Record which seeds get the longest and start germination first 10.Repeat one more time (Total of 2 trials) |
| Conclusion | Claim: The higher the salinity in water decreases the number of seeds germinated. Evidence: In our data, on day one the seeds with no salt had 5/10 seeds that germinated, however, the seeds with a seawater salt amount had 0 seeds germinated. Then on the last day tap water had all/10 seeds germinated, while the seeds with a seawater salt amount had 1 seed germinated. Reasoning: This happens because the plants with more salt grow less because the water either can not be soaked up into the plant or because the salt will cause an injury to the calls which causes it to grow less. Usually, this decreases growth in plant leaves and roots it also causes the process of photosynthesis to be slower. If new leaves cannot grow as fast as the old leaves die the plant can't produce seeds. This supports our prediction because it all wraps up to say that leaves with higher amounts of salt in the water die. |
| Investigation Theme | WOS |
| Teacher Name | Evelyn Gray |
| School Name | DeWitt Middle School |
| Session | Spring 2022 |