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Chromatography data

We are about to start the lab in fourth period. Here is the actual data I collected in 3rd period (AP Biology).

Figure out R_f values:

Data (distance in mm):

Solvent traveled: 111mm
carotene: 109mm
xanthophyll: 43mm
chlorophyll a: 21mm
chlorophyll b: 11mm

To calculate the value: the distance pigment traveled divided by the distance the solvent traveled.

By Monday (the day after break) turn in the following:

Your Rf values (or calculate using mine)
A paragraph (5+ sentences) on how chromatography is used by actual people in the real world (scientists, CSI's, etc.)

Sub assignments 2/8/06

Someone please print these out, and comment so only one copy comes to class. You can help facilitate for the class.

I would like to continue the class project, but we'll have to do that Friday. Also, Palms are in and I want to kick that off too - Friday.

For Thursday, you have a sub. I hope. If not, you still have work.

1. Microscope - label the parts (from appendix)
2. Design experiments (back of microscope sheet) - form groups of 2-3 and design three experiments. Don't forget that a proper experiment has:

proper controls
only one variable
multiple sets
proper measurement methodology

3. Diagrams to label

A. Energy flow
B. Structures of photosynthesis

4. Diagram to use in group project

Photochemical (light) reactions

You may or may not be able to get your head around this one; it is complex. Do your best because this diagram is basically what you have to understand for the group projects due Monday.

I will be in the building; you can best get in touch with me through e-mail or the blog. Let me know how this goes.

Mr. Martin

Friday Update

1) Tutorials
I am almost always available Fridays, sometimes Thursdays, occassionall Wednesdays, and almost never on Mondays and Tuesdays.

2) Today's exam - it went well for first period, badly for fourth period, as far as the multiple choice goes. Two people got 100's in first period!! In fourth, the two highest grades were 90's.


3) End of Course On Line Test Materials

Check out the following:

http://www.usatestprep.com
The username is: swdekalb
The password is: newton35

There are some quizzes for biology, by the time you finish this class you should have no problem passing them. Right now, a lot of the stuff may be new but I am encouraging you to do this as an extra science resource.

4) No school on Tuesday. From the superintendent:

The Memorial Services for Mrs. Coretta Scott King will be held on February 7, 2006 in DeKalb County at the New Birth Missionary Baptist Church.

Out of respect for the memory and legacy of Mrs. King, all schools and administrative offices of the DeKalb County School System will be closed on Tuesday, February 7, 2006.

Please keep the King family in your thoughts that day. I may visit the capital for the viewing.

Update

1.) Exam is tomorrow. I strongly encourage you to check out the extra resources on my web site.

2.)Per 1: Lab is due Monday. Any questions, blog or e-mail them.
Per 4: We will redo a portion of the lab on Monday now that we have the right plants.
Your lab will be due Wednesday

3.)Its open house, so I'm betting many of your parents are here. I got interviewed by one TV crew already; I'm expecting more in a bit. Also met with some county folks who are working to get us more shelving in the stockroom so we can start putting more supplies in the room.

See you tomorrow.