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L10: 10.1
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QUESTION: How does water vapor escape a plant?
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HYPOTHESIS: I believe that water vapor …. because …..
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PROCEDURE: Page : Focus the epidermis of a lettuce leaf on low power. Locate a stomatal unit (it will look like a bright “eye” among the cells). Draw a stomatal unit under medium or high power. Label the stoma & guard cells.
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DATA: Microscope drawing: Medium (100 X) or High (400 X)
Title: Stomatal Unit Label: Stoma Guard Cell
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DATA ANALYSIS: 1. What is the function of a stomatal unit?
2. The opening of the stomatal unit is called a ___. 3. What controls the opening & closing of a stoma?
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4. What substances enter or exit a plant’s leaves through the stomata?
5. Why do plants need water & carbon dioxide? 6. Why do plants need oxygen?
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VOCABULARY: Stoma (Stomata) Guard Cells Transpiration
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CONCLUSION: Be sure to look back at the original question.
Be sure to use complete sentences. Be sure to USE & HIGHLIGHT all vocabulary words.
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