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Investigating Static Forces in Nature: The Mystery of the Gecko

Investigate how geckos walk on ceilings in this physical science lesson. Analyze images, make interpretations, and ask questions to understand gecko adhesion. Discover forces, surfaces, and tools at play in gecko adhesion. Explore nano-level forces and connections to gecko adhesion.

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Investigating Static Forces in Nature: The Mystery of the Gecko

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  1. Investigating Static Forces in Nature: The Mystery of the Gecko Physical Science Lesson 1 How Can a Gecko Walk on a Ceiling? NanoSize Me Tricky Feet Videos: http://www.mcrel.org/nanoleap/multimedia/index.asp

  2. Data Table

  3. Make observations about the following images. Note similarities and differences. Observations Image 1.2 Image 1.1 Image 1.3

  4. Make interpretations about how the organism is “sticking” or “adhering” to a surface. Interpretations Image 1.2 Image 1.1 Image 1.3

  5. What do the images have in common? What do you observe about the surfaces and textures in these images? What do you interpret about how the gecko’s foot interacts with the surface? 4. What questions do you have or additional information do you need to know in order to understand what makes a gecko adhere to surfaces? Questions

  6. 5. What are some possible methods for the gecko to adhere to a surface? 6. Describe how you made your observations in today’s lesson: a. What tools did you use? b. Were your observations at the visible or invisible scale? c. What is the dominant force at this visible scale? 7. What variables affect the force between the animal and the surface? More Questions

  7. Describe one or two ideas that you learned during this lesson. How do you think the gecko sticks to the ceiling? What should we explore next? Making Connections

  8. Flow Chart Flow Chart • How Can a Gecko Walk on a Ceiling? • Scale: Visible • Dominant Force: Gravity • Tools: Eye 2. What Do We Mean When We Speak About Surfaces in Contact? 3. What Are Your Ideas of Small Sizes? 4. What Do We Learn When We Look More Closely? 5. What Types of Forces Can Hold Objects Together? 6. How MUCH Force Is Needed to Make an Object Stick? What Factors Affect the STRENGTH of Force Acting? 7. How Do We Measure Forces at the Nano Level? 8. How Can a Gecko Walk on a Ceiling?

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