Friday, September 28, 2007
Fri-Day 2
Bio- using our PowerPoint that is linked on Blackboard, we went over chemical equations and
simple vs. complex molecules. We focused on special proteins called "enzymes", which function to speed up or "catalyze" biochemical reactions. We drew a "lock and key" model picture of an enzyme speeding up a reaction between two reactants/"substrates". I'll try to get a video of that for Monday.
Bring your Unit 1 exam in on Monday so that we can finish reviewing that test and discussing test-taking skills. We have a double on Monday so we will finish our Scientific Investigation presentations then.
Chem 7/8- we discussed the various forms of energy including chemical potential energy, which is stored, for example, in the bonds between atoms of molecules.
We then discussed the various temperature scales (temperature is a MEASURE of the AVERAGE KINETIC ENERGY of the particles in a sample of matter), the most important and relevant of which is the Kelvin or "absolute" temperature scale.
We then conducted a lab showing the temperature changes that occur as water changes from solid to liquid to vapor. Note that some of you got some bizarre temperature changes due to your measurement of the temperature of the BEAKER glass instead of the water contained by the beaker. Doing a lab is easy; doing a lab properly can be tedious.
Lab folders were filled and collected. Any overdue materials are due in your folder on Monday- no points will be deducted if those materials are in the folder by then.
Chem 9-we discussed the various forms of energy and identified them as either a form of KINETIC energy (having to do with any type of MOTION) or of POTENTIAL energy (having to do with the relative POsitions of particles). We discussed chemical potential energy, which is stored, for example, in the bonds between atoms of molecules.
Lab folders were filled and collected. Any overdue materials are due in your folder on Monday- no points will be deducted if those materials are in the folder by then.
simple vs. complex molecules. We focused on special proteins called "enzymes", which function to speed up or "catalyze" biochemical reactions. We drew a "lock and key" model picture of an enzyme speeding up a reaction between two reactants/"substrates". I'll try to get a video of that for Monday.
Bring your Unit 1 exam in on Monday so that we can finish reviewing that test and discussing test-taking skills. We have a double on Monday so we will finish our Scientific Investigation presentations then.
Chem 7/8- we discussed the various forms of energy including chemical potential energy, which is stored, for example, in the bonds between atoms of molecules.
We then discussed the various temperature scales (temperature is a MEASURE of the AVERAGE KINETIC ENERGY of the particles in a sample of matter), the most important and relevant of which is the Kelvin or "absolute" temperature scale.
We then conducted a lab showing the temperature changes that occur as water changes from solid to liquid to vapor. Note that some of you got some bizarre temperature changes due to your measurement of the temperature of the BEAKER glass instead of the water contained by the beaker. Doing a lab is easy; doing a lab properly can be tedious.
Lab folders were filled and collected. Any overdue materials are due in your folder on Monday- no points will be deducted if those materials are in the folder by then.
Chem 9-we discussed the various forms of energy and identified them as either a form of KINETIC energy (having to do with any type of MOTION) or of POTENTIAL energy (having to do with the relative POsitions of particles). We discussed chemical potential energy, which is stored, for example, in the bonds between atoms of molecules.
Lab folders were filled and collected. Any overdue materials are due in your folder on Monday- no points will be deducted if those materials are in the folder by then.
# posted by C @ 6:51 AM 
