Layers+of+the+Earth

Lesson One - **Earth System A-1-1 **

Lesson Two - **Earth's Interior A-1-2**

Lesson Three - **Convection and the Mantle**

for lesson 3 - lava lamp: https://www.youtube.com/watch?v=h_lQ2tMgLVM https://www.youtube.com/watch?v=rSzjFvMFQhg