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Plant Tropisms Worksheet
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Plant Tropisms Worksheet
📚 Part 1: Understanding Stimulus and Response
1. Define the following terms in your own words:
Stimulus: _________________________________________________
Response: _________________________________________________
2. Match each tropism with its correct stimulus by drawing a line:
Phototropism
Gravitropism
Thigmotropism
Hydrotropism
Water
Touch/Contact
Light
Gravity
3. Which tropism would help a plant's roots grow downward into the soil?
PhototropismGravitropismThigmotropismHydrotropism
🎬 Part 2: Video Observations and Analysis
4. Based on the phototropism video, describe what happened to the plant seedlings:
5. Explain WHY the plants in the video responded this way. What advantage does this give them?
6. If you placed a plant in a dark room with only one small window, what would you predict would happen? Explain your reasoning.
🌱 Part 3: Application and Extension
7. A vine growing up a fence post is an example of which tropism(s)? Tick all that apply:
Phototropism (growing towards light)Gravitropism (responding to gravity)Thigmotropism (responding to touch)Hydrotropism (growing towards water)
8. Explain how plant tropisms help plants survive in their environment. Give at least two specific examples.
9. Extension Challenge: Design a simple experiment to test how plants respond to light. Include what materials you would need and what you would measure.
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