Why are the continents "drifting"?

Complete the assignment on the "videos" tab to learn why the continents are drifting.  Make sure to title your assignment, to copy the questions, and to answer in complete sentences.  The assignment can be found here:  Why are the continents "drifting"?

Also, check out Ms. Shon's demonstration with hot (yellow) and cold (blue) water to observe how temperature affects density in Temperature affects Density.

Due: Monday, March 17, 2014