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| Home > Investigating
Structure and Function > Seeds |
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Seeds
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| Order and Timing of Events |
| Overall Objective |
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To examine changes during germination, in terms of the order of events or their timing. For example, do roots grow before shoots?
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| Lessons |
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Students observe and re Close observation of seeds in plastic bags, water agar, and other "visible media" such as the root view, allows students to see the emergence of seed structures. After becoming familiar with this process, students can collect data on several aspects of this process. For example, seed structures can be measured on a daily or semi-weekly basis. In addition, students can note the timing and duration of seed structures during the seed germination process. These data can be collected and represented to highlight the variation in timing within and across types of seeds. cord changes in different kinds of seeds and seedlings, illustrate their understanding of change by drawing sequences, and propose, plan and conduct investigations.
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Seed bags : Students compare changes in four types of seeds and seedlings.
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Seed sequence drawings : Students illustrate seed changes and seedling development.
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Seed images : Students note changes during germination of different seeds.
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| Seed Images |
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To provide prompts (images of seeds at different stages of germination) for students to discuss or write about change over time or seed structures. |
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| Overview of Lesson |
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During this unit, we used seed image photos to conduct post-assessment interviews with several children. Students were presented with photos of different seed types and compared them to seeds that had been observed during class investigations. Students were asked to note how the seed changed over time and describe seed or seedling features and function of those features. We asked students to put a series of photos in order, to show changes during Fast Plant germination. Some photos showed dried and soaked seeds of the same type and students were asked to describe differences between dry and soaked seeds.
In the future, we plan to use the seed images as both a pre- and post -assessment. In this way, we can document student learning effectively. Another potential use for these images would be to stimulate student writing in journals or learning logs that could be used to keep track of student ideas about seeds and how these ideas develop over the course of the unit.
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Last Updated:
February 17, 2005
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