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Milk Thistle

Project by group dmsstiemspring2022

Explore Germination means to start growing. Seeds wait until 3 needs are met 1.) Water 2.) Correct Temperature 3.) Good Location. During it’s early stages of growth the seedling relies upon the food supplies stored with it in the seed until it is large enough for it’s own leaves to begin making food throught photosynthesis Seeds preform Photosynthesis Seeds also preform Cellular Resperation The seed is mostly made of CO2 (Carbon Dioxide) & H2O (Water.)
Research Question Does the size of the seed affect the germination rate of the seed?
Predictions I think that the size of the seed will affect the growth rate and length / width of the plant but the bigger the seed the longer it will take to grow. I say this because when things are bigger they tend to take longer to do what they are meant to do.
Experimental Design Independent Variable = The sizes of seeds Dependent Variable = The length of the stem and roots Variables to Control = The amount of water, the amount of sunlight it is being given, The amount of paper towel, temperature of water, and the temperature of the air around it. Materials: Paper towel, Petri dish, some sort of watering tool, and the seed.
Conclusion Claim: The bigger the seed the faster the germination will be. Evidence: On day one, one of the large seeds germinated but none of the small ones did. On day two, 3 large seeds germinated and two small ones did. This was a continuous pattern of more large seeds germinating and growing more when less small seeds germinated and grew less. (We don’t have measurements or numbers for the growth.) Reasoning: Large seeds outgrow small seeds. The effects of large seed size on plant growth are unanimously positive. Larger seeds produce seedlings that emerge faster, are bigger, and have better access to nutrient sources. The smaller your seeds are the slower growth rate they are going to have and the smaller they will be (usually). Seed size studies are and have been conducted on a large variety of plants worldwide with similar results. Plants with larger seeds emerge faster than those with smaller seeds, according to Katherine L. Gross of Ohio State University. This gives plants with larger seeds an evolutionary advantage over small-seeded plants, because early emergence gives plants speedier access to local nutrient sources. This will stunt or kill small-seeded plants, competing for the same nutrient sources that emerge slower. I kind of expected this to happen because I figured that the bigger seed is, the more things it contains and the bigger it’d get.
Investigation Theme WOS
Teacher Name Kristen Stiem
School Name DeWitt Middle School
Session Spring 2022


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NSF_Logo.jpg This material is based upon work supported by the National Science Foundation under Grant #2010556 and #1502892. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

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