| Explore | Plants require water, air, the right temperature, and the right area. It takes time for plants to grow. Some plants can provide food and oxygen. Plants are multicellular. Plants require nutrients. |
|---|---|
| Research Question | How does salt effect the germination of the round radish seed? |
| Predictions | I think that when we add the salt it will kill the plant slowly. I think this because of the theory “Salt Application”. This theory states that when you add salt to a plant the salt can enter the plants cells, then the buds and twigs of most plants will lose cold hardiness and is more likely to die. |
| Experimental Design | 1.Label 2 Petri dishes salt and the other 2 water 2.Soak the paper towel in water (do not wring it out) 3.Sprinkle ¼ of a teaspoon of salt on top of the paper towel 4.Put the paper towel in your Petri dish 5.Put 5 round radish seeds on the paper towel 6.Close the lid (Not optional) 7.Every other day resoak and put salt back on the paper towel 8.Wait and see if the seed died or germinated 9.Redo everything but without salt two times |
| Conclusion | Claim- When you add salt to the water you give the round radish seeds it affects the germination process and they do not grow. Evidence- When you add salt it stops or slows the growth. We know this because the salt water seeds never germinate and started to slowly turn black and die throughout the week. The tap water seeds germinated quickly and never died. Our data supported our prior knowledge and was a somewhat fair. I feel somewhat confident because we did everything to make it fair but the tap water probably had other chemicals in it and we put our plants in a cupboard so dust could have got onto the plant. We could also do an experiment testing how clean the water is to see what it has in it. Then if we were to do it again it would be cleaner. Reasoning- The theory salt application states that when you add salt to a plant the salt can enter the plant cells, then the buds and twigs of most plants will lose cold hardiness and is more likely to die. The salt enters the cells through osmosis. Osmosis is when the liquid (mainly water) has left one plant cell to find a stronger cell. It needs a stronger cell because the salt we added to the water has stunted the cells growth and it can no longer produce food. So the water goes to find another cell but then it pollutes that cell. Soon, the plant will slowly die because there will be no cells left to produce food. |