Sweet Density & Plate TectonicsSweet 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

DensityDensity

Less Dense, More Dense…HUH?

Let’s Figure Out Density for a

Twix and a 3 Musketeers!

Candy Bar DensityCandy Bar Density

• Density = mass / volume

• Mass it in grams with a triple beam balance

• My Best Friend (Middle, Back, Front)

Triple Beam Balance – Mass (g)Triple Beam Balance – Mass (g)

Graduated Cylinder – Volume (mL)Graduated Cylinder – Volume (mL)

Cylinder with Candy

- Cylinder Only

Volume of a Solid

30 mL

- 23 mL

7 mL

Using the DataUsing the Data

• TwixMass - ____g ÷ Volume – 15 mL = _____g/mL

• 3 Musketeers Mass - ____g ÷ Volume – 20 mL = _____g/mL

Calculating DensityCalculating Density

PredictPredict

• If the density of water is 1 g/mL

• Will our candy bars sink or float?

Making PredictionsMaking Predictions

Twix vs. 3 MusketeersTwix vs. 3 MusketeersModeling the Continental and Modeling the Continental and

Oceanic Crusts Oceanic Crusts

Twix = thinner, more dense

3 Musketeers = thicker, less dense

If I collide a Twix with a 3 Musketeers then_______________________, because_______________________.

Twix vs. 3 MusketeersTwix 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

Creating a Graphic ModelCreating a Graphic Model

Videos Videos

• Divergent Boundary  • Convergent Boundary   • Transform Boundary 

• Types of Faults   • Plate Movement Direction:  (picture)   

Density of the Earth’s CrustsDensity 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)

Update your PicturesUpdate 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