The Physical Science class is going to take a deeper look at Chemistry. We start with labs. This may seem counter-intuitive. When kids see chemical reactions first, it is easier to discuss those reactions. Last week, the class did an Alka-selzer lab and Baggie Chemistry lab. (See the earlier post for these links.) next time, the kids are going to graph on the TI calculators their data from the Alka-seltzer lab before performing two more labs. The kids are going to learn how to write and name chemical compounds. Initially, I ask the kids to differentiate between a chemical and physical change. What is evidence for a chemical reaction? Evidence can be a color change, a change in temperature, gas produced or a solid which forms. The kids should do "cook-book" labs, experiments with clear instructions, before trying any inquiry-based labs. Most of the labs the kids will do involve either household chemicals or materials easy to acquire. Below are the links for the next class. If time permits, I am going to have the kids collect and graph data from start to finish using the EasyData software on the graphing calculators and the EasyTemp probes.
1. 1+2+3 = Black!
2. ACS Precipitate Lab
3. Putting the Ions Into Their Hands
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