PLATE KINEMATICS, PALEOMAGNETISM, CONVECTION

Demonstrate plate kinematics using paper cutouts: transforms, rotations about Euler poles, triple junctions, etc. Cutout of Pacific-North America boundary shows ridge, transform, and subduction portions. Absolute plate motions are demonstrated using pencil as "mantle plume" and moving one paper (simulating plate) over a fixed one (simulating mantle)

Illustrate dipole magnetic field using commercially available clear plastic box filled with iron filings in oil, into which a magnet is slid (works nicely on a overhead projector).

Dip needle illustrates inclination of Earth's field.

Demonstrate convection, using beaker containing water and mica flakes (tracers) on a hot plate, which heats up. With proper lecture pacing and luck, convection begins just as the Rayleigh number discussion reaches appropriate point.