Seeds are a fascinating lens through which a huge amount of curriculum can be explored. From mathematical routines like ‘which one doesn’t belong’ to sorting by attribute, to understanding adaptations and the needs of living things, a seed inquiry provides an entry to complex understandings, and a bridge to meaningful cross-curricular learning in the outdoor classroom.
Seed Inquiry Materials required:
- clear plastic baggies
- starting soil or paper towel
- pole bean seeds
- a window with natural light
- masking tape
- a piece of dark construction paper
- Life Cycle Of A Green Bean Plant Model (link to amazon.ca)
Seed Inquiry Process:
Begin by labelling each baggie with an essential basic being denied for seed germination. I label one ‘no soil’, ‘no water’, ‘no sunlight’, and ‘no oxygen’. The fifth baggie will be the control with everything provided for seed germination. I usually place two seeds in each baggie to ensure the experiment doesn’t flop because of poor seed quality. Pole beans work best, in my experience. You can buy them online here. Add a small amount of starter soil to all baggies, except the ‘no soil’ bag. (This experiment also works with moist paper towels instead of soil- I use soil to simply avoid a bunch of kids asking me why are we growing them in paper towels, if they need soil!) Add water to all baggies, except the ‘no water’ bag. Zip up the baggie for the ‘no oxygen’ bag. And encase the ‘no sunlight’ bag in a folded piece of black construction paper. Attach one side of all baggies to the window with masking tape, leaving them open for plant growth, watering and oxygen availability.
Observe the bean growth over time and record in nature or science journals. Children can label the stages of plant growth: seed, germination, seedling and mature plant. Once the beans are growing well, they can be removed from the window and root growth can be observed closely. There are so many questions that will arise! Why are there hairs in the roots? Why are the roots growing across the baggie?
Connecting Seeds to Scientific Inquiry:
The best part of this inquiry, is inviting students to predict and make a hypothesis on which seeds will or will not germinate. The truth is, most seeds are resilient and can germinate in all sorts of growing conditions. The only bean seeds in this experiment that will not germinate at all are the ones that lack water, which can lead to an whole new inquiry on the importance of our water cycle! Links to grade specific BC Science Big Ideas specific to this experiment are highlighted below:
Plants and Animals Have Observable Features
- what are your basic needs?
- what basic needs do plants and animals have in common?
- how do the different features of plants and animals help them meet their basic needs?
- how do local plants and animals depend on their environment?
- how do plants and animals use their features to respond to stimuli in their environment?
- how do plants and animals adapt when their needs are not being met?
- why are life cycles important?
- how are the life cycles of local plants and animals similar and different?
- how do offspring compare to their parents?
- why is water important for all living things?
- how do living thing things sense, respond and adapt to stimuli in their environment?
Under the Learning Standards, Curricular Competencies are well aligned with any scientific experiment. These include the skills of:
Questioning and Predicting
Planning & Conducting
Processing and analyzing data and information
Applying and innovating
Recommended Books for Seed Inquiry:
The following books are recommended for their clarity on seed growth and plant life cycles. Clicking on these links will take you to Amazon.ca
From Seed To Plant by Gail Gibbons
A Seed Is Sleepy by Dianna Hutts Aston
One Bean by Anne Rockwell
What Seeds Need To Grow
Beans do not transplant well once they have germinated. We often take ours out and try to plant them, but in my experience, you’ll need to overplant the area with plenty of new bean seeds to get the growth you are looking for. Besides, the point of this experiment is really to slow down and take a good look at how seeds germinate with a window to the activity and growth that is normally hidden by the soil. If you want to, you can have students take the plant apart and really explore the different parts of the plant with magnifying glasses or microscopes.
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