||So far we know that all plants have roots, all plants need sun to grow, all plants come from an already living thing, and all plants are considered living things. Some questions we have are why do plants need sun, why can some seed grow faster than others, and why can't seeds grow as well without soil?
||If we gave the seeds paper towel that they're resting on different amounts of water how would it effect the seeds growth?
||If we put different amounts of water on paper towel with pea seeds on it , then the one with the most water will grow the fastest.
||Our investigation plan: independent variable is the amount of water given the paper towel. The dependent variable is the growth of the seed. And the variables we are controlling are the type of seed, the kind of paper towel, the time we water it and record data.
Procedure: 1) put dry paper towel in petridish #1 2) place pea seed in petridish #1 3) place damp paper towel in petridish #2 4) place pea seed in petridish #2 5) place soaking wet towel in petridish #3 5) place pea seed in petridish #3 7) water paper towel and seed everyday 8) record data every day
||The more water you give a pea seed the faster it will germinate. We observed that our dry section has the least average over the course of six days with the average being 5.9 MM, the damp pea seed had an average of 22.4 MM over the course of six days, the soaking wet pea seed had an average of 35.4 MM over the course of six days, making it be the highest average out of the three settings. This is just how we predicted it to happen, we think this was a fair test because we had 10 seeds for each setting. But one important thing to recognize is that pea seeds take more time to germinate than most other seeds. We think this happened because plants need water to dissolve the chemicals they used to do their biology. Another reason plants need water is because life requires a lot of chemical reactions. Photosynthesis is a big part in why plants need water because i order for a plant to grow photosynthesis has to take place and water is a critical part of the photosynthesis process. If you do not have water and photosynthesis does not take place then the plant can not provide any food for itself which will make it mostly impossible for the plant to grow. Respiration is a chemical reaction that converts glucose and oxygen into asenosine triphosphate, a command used to fuel many other chemical reactions in the plant. Another chemical reaction that takes place in "stomatal activity". Stomatal activity" is the activity of the plants stomata that is controlled largely by a chemical reaction involving potassium. When potassium is introduced to the guards cells around the stomata it causes them to swell and open. When there is less water in the environment, potassium is pumped out of the guards cells and the stomama closes, conserving the water inside the plant. Plants without enough potassium are less able to regulate their water levels.
||Middle School Students (grades 6,7,8)
||DeWitt Middle School