Below are the final grades for BIO161. There was not a curve due to the high median (in the eighties), but this is in line with course policy. Overall performance was good, and the cladograms didn’t make me cry.
Congrats and good luck, don’t forget the student evals. You won’t hurt my feelings, I’m sure ex-girlfriends have said much worse about me.
FINAL GRADES BIO161
Here are the final grades for the CEM131 class. They class median was 50% (which is high for nationwide standards) and the class high was 77% (in the 95% percentile nationwide). So I gave a curve of 23% to the final exam. Overall class performance was very good.
FINAL GRADES – CEM131
Here are the Penultimate grades in BIO161. We will go over it in class.
Below are the final grades for BIO220. Be sure to check them before I post them to the server on Friday evening.
FINAL GRADES BIO220 WS17
This grade is the lowest your grade can be, with a zero on the talk tomorrow.
Here are the grades for CEM131, we will go over them in class.
You can quit refreshing the page. I will post the new grades for courses on Monday.
Here is a copy of the questions from class with the last four answered.
Questions from Class
Now to the second issue, my huge brain fart in class. I knew when I worked it out (which was about five minutes after the last person left) I would want to bang my head on the board for missing the obvious. The problem was that we were solving the wrong problem. The Dilution Equation (C1V1 = C2V2) works when you think about how you made each experiment, not comparing different experiments. So looking at the second experiment you did, where you made the bleach solution by mixing 5 ml of bleach with 5 ml of water. Instead of comparing this to experiment one, think about the dilution itself. C1 = 1.7X10(-4) M, and the V1 = 5 ml (the amount of bleach added), C2 = x, and V2 = 10 ml (the amount of bleach plus the water added). Solve for C2 = (C1 X V1)/V2 which gives you a concentration half the original. in the third experiment, change V1 to 2.0 ml and you get 1/5 the original concentration. I told you it was simple.
I apologize for the brain fart. Sometimes when you are so used to doing the idea in your head, you forget how to translate it into the math… and this was one of those time.
Here are the solutions for most of the questions in the practice set… I gotta have some fun with the remaining two.
Practice Set 4 Answers
CEM131: We will be finishing up the Gases chapter this week and starting on Solutions. The Hardness of Water lab is this week’s lab fun.
BIO220: We will continue with Eukarya pathogens and start Unknowns. I have posted the current grades, please review missing materials.
BIO161: We will finish Protostomes on Tuesday and then the Exam on Thursday. The lab will either be the field hike or dissection, depending on weather.