From Seed to Seed:
Activity 14: Sunscreen
Associated Lesson Topics:
Planting the Seed...
Why do you think leaves look the way they do? What purpose do you think leaves serve? How does the structure of a leaf help it serve this purpose? What does the leaf need to do its job? Have students brainstorm a list of things that leaves might need to do their job. Below we include the procedure for testing whether plants need light to do their job. You can follow this procedure or encourage students to come up with their own.
The primary purpose of leaves is to photosynthesize. In order for photosynthesis to take place, the leaves need to be exposed to light. In this experiment, your students will learn that without light, plants are unable to photosynthesize and produce food.
Harvesting the Crop...
What do you notice about the parts of the leaf that were covered?
Which part of the leaf looks healthier-the part that was covered or the
part that was exposed to light? From your results, what can you conclude
about what plants need to do their job? This provides you with the
opportunity to begin exploring food production in plants and the use of
light in photosynthesis.
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