| Research Question | How do different after ripening techniques affect the germination of the seed? |
|---|---|
| Predictions | If we test four after ripening methods on nasturtium seeds, then they will germinate more quickly (all of them). The method we think will work the best is nicking the seed coat. We think this because it gives the embryo a clear passageway out of the cotyledon. |
| Experimental Design | Procedure: 1) Soak 4 nasturtium seeds overnight. 2) Prepare 5 different Petri dishes by putting a damp paper towel in the bottom of each dish. 3) Prepare after ripening (don’t do any of the following instructions to the pre-soaked seeds) a. Nick the end of 4 seeds b. Burn 4 seeds (away from the embryo) c. Boil 4 seeds in water d. Soak 4 seeds in acid for ____ 4) By now you should have 20 seeds all prepared differently 5) Put seeds in Petri dishes according to how they were prepared. (all seeds that were boiled in water go together, seeds that were nicked go together, etc.) 6) Place petri dishes by the window 7) Water seeds 8ml every day (in school) 8) Take observations on data table and add a sketch for every dry you check on the seeds |
| Investigation Theme | WOS |
| Grade Level | Middle School Students (grades 6,7,8) |
| School Name | San Francisco Friends School |
| Session | Spring 2019 |