CHEMISTRY – Happy Homecoming! How’d you like playing with precipitates? Here’s the lecture on chemical and physical changes, and also on the laws of conservation of mass and energy. Good job on tracing the energy transformations from one form to another. Make sure you can apply all this on the test (and in life!). 🙂
NCS Chemistry and Physics
Use what talents you possess, for the woods would be silent if no birds sang except for the best. – Henry van Dyke
