||I know that different plants grow at different speeds and on different terms. For example, Cacti don’t need much water because they are used to living in the desert, while most flowers and other plants won’t grow without lots of water. Different types of seeds store their energy on different places, dicot seeds store their energy in the cotyledons, while monocots store their energy in reserves, seperate from the cotyledons. Seeds stay dormant until they are in the proper conditions they need for them to grow healthy. Seeds are always alive unless they get eaten or cooked, but they are just dormant, meaning they won’t grow until they are placed in the right conditions. In order for seeds to continue growing after they use all of their stored energy, they need to start photosynthesis. Photosynthesis is the process of when plants create their own food so they can grow, if plants don’t photosynthesis they will die because they will have no food.
||How does the type of water affect how fast the plant germinates? (sugar water, saltwater, tap water) We are measuring plant growth.
||If you use sugar water, then the plant will grow more. This is because it has more sugar, as more food.
||Soak one strip of paper towel in one cup of each type of water (one strip per type)
Put every strip of paper towel in a different petri dish
Put 10 seeds into each petri dish, on the strip of paper towel
Check growth every other, or every few days (weekend)
Measure growth using millimeters
Repeat steps 4 and 5
||Plants will germinate the most when tap water is used. The tap water plants increased fro, 5-20 mm everyday, while the salt water seeds didn't germinate at all, and the sugar water plants grew from 1-6 mm everyday. This is because tap water is the healthiest water, salt water dehydrates the plants, because it increases the solute concentration, lowering the pressure of the cell walls, making the plant unable to absorb water. The sugar water attracted lots of bacteria, causing the plant to mold and die. This shows that tap water is the healthiest water, causing the plants with tap water to grow the most.
||Middle School Students (grades 6,7,8)
||DeWitt Middle School