Tuesday, November 20, 2007
Tues-Day 2
Bio- we took our unit test on transcription, translation, and mutation. Over the break, I will post your grades.When you return, be ready to work quickly and efficiently on our next unit: Photosynthesis and Respiration.
Have an enjoyable and festive Thanksgiving!
Chem 7/8- we did a lab that provided an analogy to the relative atomic mass scale as well as a way to "see" how isotopes of an element contribute to its overall "weighted average atomic mass".
Over the break, work on the lab questions and come prepared with any questions that gave your trouble. In class, we will then make sure that you all are solid gold on the questions and then you will hand the lab in.
We then began our discussion of the various atomic models that changed over time due to increasingly more sophisticated experiments and lab equipment. We discussed the Dalton Model of the atom and his conclusions/inferences from the experiments of Lavoisier and Proust. We then discussed Thomson's Cathode Ray (Crooke's) Tube experiment that showed that negative particles (which he called electrons) are part of an atom. We then began to discuss the Rutherford Gold Foil Experiment, which was a test of the Thomson model of the atom. We will continue our discussion on Monday. Both the Thomson and Rutherford videos are posted on Blackboard.
Also, work on the "webquest" on the atomic models. That will NOT be due on Monday but rather on Wednesday.
Reminder, for the rest of the year, I will collect and grade the unit hw packets that are given out at the beginning of each unit. The Atomic Structure (Topic #5) hw packet is due Friday, November 30th.
Have an enjoyable and festive Thanksgiving!
Chem 9- We did one of the atomic mass problems from yesterday's lab. Over the break, work on the lab questions and, if you have questions about the lab, we will finish that on Monday in class during which I will collect the lab.
We then began our discussion of the various atomic models that changed over time due to increasingly more sophisticated experiments and lab equipment. We discussed the Dalton Model of the atom and his conclusions/inferences from the experiments of Lavoisier and Proust. We then began to discuss the Thomson's Cathode Ray (Crooke's) Tube experiment that showed that negative particles (which he called electrons) are part of an atom. Over the break, view this video that is posted on Blackboard.
For homework over the break, on Blackboard, I posted a "webquest" assignment on the atomic models. That will NOT be due on Monday but rather on Wednesday.
Reminder, for the rest of the year, I will collect and grade the unit hw packets that are given out at the beginning of each unit. The Atomic Structure (Topic #5) hw packet is due Friday, November 30th.
Have an enjoyable and festive Thanksgiving!
# posted by C @ 11:11 AM 
