How Many Seeds Can You Get From A Single Seed?
Thanks to a grant by the Chatham Education Foundation, the second graders at MAS will solve this riddle!
On March 10, 2008 the second graders planted their Brassica seeds and began to explore the life cycle of the plant. During the 44 day life cycle, the students will observe, measure, and tend to their plants. The final step is to thresh and harvest the new seeds. We hope you enjoy watching the learning unfold. Please feel free to comment and share your thoughts with us. So how many seeds do you think you can get from a single seed?
Here are the Brassica plants on Day 1 under the lights. These plants belong to both 2K and 2S.
On Day 4, (March 14) the students thinned their plants so one plant could thrive in each cell. They also had an opportunity to observe the seed leaves and the roots. Many students still found the seed attached to the root.
Brassica plants not yet thinned. As many as three plants per cell.
Brassica Plants after thinning process. Just one plant per cell.
Here is a closer look at the Brassica plants’s seed leaves and roots.
Day 7- March 17. Each plant is growing taller and stronger. The seed leaves are still visible, but if you look closely, you can also see the true leaves beginning to grow.
Day 10- March 20th
This is a picture of our Brassica plants. When we measured them and they were between 3 and 5 centimeters tall. The plants were also spreading out. We observed the true leaves, seed leaves, little hairs attached to the true leaves and possibly even some buds.
Here is a picture of 2K’s and 2S’s plants. Compare this picture with the picture from Day 1. Do you notice any changes?
Below are three pictures from Day 14: Monday, March 24, 2008.
On Day 14, after the long weekend, we noticed a great deal of growth and we were not all expecting it. The plants grew anywhere from 7 to 11 centimeter tall. We observed more true leaves and more buds. On some plants there are four or more buds. We predict that these buds will bloom soon. By RM, AC, PH, AC, JF
On Day 14 we also made bee sticks. Don’t worry, the bees are dead and dried. They will not sting us. To make the bee sticks we put glue on the toothpicks, put the bees on their backs and glued the bees to the sticks. We observed the bees with magnifying lens and noticed they were not black and yellow, but brown and black. We also observed that they are very hairy. We will use these bee sticks to pollinate the flowers so we can move on with this process.
By KS, HE, JD, MD
On Days 17 and 18, Thursday and Friday, we pollinated our flowers with our bee sticks. The two pictures above show the pollination process. We rubbed the bee on the flowers and the pollen stuck to the bee. We then rubbed our bees on different flowers around the classroom. The bees have so much hair because the pollen has to stick to their hair as they carry the pollen from one flower to another.
By MB, JW, BB, MP
Also on Days 17 and 18, March 27 and March 28, we observed the Brassica plants and specifically the flowers. The flowers are blooming each day and are getting bigger. The flowers have four yellow petals and four green sepals underneath the petals. Our plants are now between 10 and 20 centimeters tall. We predict our plants will grow even taller. We wonder what our flowers will look like on Monday, Day 21.
By AW, JG, TL, AS