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Exploring the Density and Dynamics of Plate Tectonics through Candy Bars

This engaging activity demonstrates the theory of plate tectonics by using candy bars as models for understanding crust movement and density differences. Students hypothesize about the sinking or floating of different candy bars based on their density measurements. They will utilize tools like a triple beam balance and graduated cylinder to collect and analyze data, demonstrating the principles of mass, volume, and density. The interaction between different densities is modeled through creative visual representations of crust interactions, making learning about geology fun and tangible.

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Exploring the Density and Dynamics of Plate Tectonics through Candy Bars

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Presentation Transcript

  1. Sweet Density & Plate Tectonics • Explain the Theory of Plate Tectonics • Explain crust movement by using a visual model • Make and test a hypothesis • Collect, organize and use data from a measurement tool

  2. Density Less Dense, More Dense…HUH? Let’s Figure Out Density for a Twix and a 3 Musketeers!

  3. Candy Bar Density • Density = mass / volume • Mass it in grams with a triple beam balance • My Best Friend (Middle, Back, Front)

  4. Triple Beam Balance – Mass (g)

  5. Graduated Cylinder – Volume (mL) Cylinder with Candy - Cylinder Only Volume of a Solid • 30 mL • 23 mL • 7 mL

  6. Using the Data • Twix Mass - ____g ÷ Volume – 15 mL = _____g/mL • 3 Musketeers Mass - ____g ÷ Volume – 20 mL = _____g/mL

  7. Calculating Density

  8. Predict • If the density of water is 1 g/mL • Will our candy bars sink or float?

  9. Making Predictions

  10. Twix vs. 3 MusketeersModeling the Continental and Oceanic Crusts Twix = thinner, more dense 3 Musketeers = thicker, less dense If I collide a Twix with a 3 Musketeers then_______________________, because_______________________.

  11. Twix vs. 3 Musketeers • Draw a picture of what happened • Label the candy bars using these terms • Convergent Boundary • Less Dense • More Dense • Subduction • Oceanic Crust • Continental Crust • Add arrows of directional movement

  12. Creating a Graphic Model

  13. Videos  • Divergent Boundary • Convergent Boundary • Transform Boundary • Types of Faults  • Plate Movement Direction:  (picture)

  14. Density of the Earth’s Crusts • Oceanic Crust = 3 g/mL • 4-7 miles thick • Made mostly of Basalt (an igneous rock) • Continental Crust = 2.7 g/mL • 20-25 miles thick on average (max – 45 miles thick!) • Made mostly of Granite (an igneous rock)

  15. Update your Pictures • Check Labeled Terms • Convergent Boundary • Less Dense • More Dense • Subduction • Oceanic Crust • Continental Crust • Add numbers of Densities • Hang Picture & Report out to class 

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