Chemistry 12:  Today we did Lab 21D, which is due today or maybe tomorrow.  No homework is due over the holiday - please enjoy yourself, rest up, be ready for the last few weeks of this course after the break.  See you on Friday at the skating rink.

Science 8:  We took notes on the structure of the earth, which is analogous to the structure of an apple (thin crust, mantle, outer core, inner core).   We paced out 10 m in the classroom and did some calculations to determine the number of steps required to cover certain distances.  Most students were able to determine the distance from our classroom to the stair-top near the library, which is 72 m.  In the second half we read an article on Continental Drift, then we completed a cut and paste that showed us how evidence was used to determine the shape of Pangaea.   This short clip is funny, but doesn't really explain Continental Drift.