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

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

Candy 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)

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

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

Calculating Density

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

Making Predictions

Twix vs. 3 Musketeers Modeling 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_______________________.

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

Creating a Graphic Model

Videos Videos Divergent Boundary Convergent Boundary Transform Boundary Types of Faults Plate Movement Direction: (picture)

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 miles thick on average (max – 45 miles thick!) Made mostly of Granite (an igneous rock)

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