group 4 project

Hello class,

As you know, we will be doing a group project with other science students. The form of this project will be a public service announcement / media campaign / ad campaign about how to encourage sustainability.

We will be having a contest to see which group designs the best campaign to encourage sustainability. The groups that are in the top 5 will have their campaigns posted so another school may view them and vote on the best one. We are looking into prizes for the best groups, too.

We will begin work on this on january 5th. To prepare you for this projecct, there's two things I'd like you to do over break.

1. Goto frontline and watch the video on heat. (120 minutes)

2. review the questions in the discussion area of the frontline site.

3.  Sign on to the Group 4 moodle and respond to the video.  You have been assigned groups that I shared in class.  This last point can be done as homework on January 4th if you're not sure how to use moodle.  (I'm right there with you!)

Have a relaxing break, class.

osmosis potato lab

The write up should include the following:
Purpose
procedure
data
processed data

conclusion and evaluation

The conclusion and evaluation will be evaluated using the IB rubric distributed in class today.  Attach that to your lab report.  You have until the exam period to finish the write-up.  Do not skimp on this assignment.  It will count as a test grade (hurrah!)

Periood 1 data:

	Initial length	Initial Mass	Final length	Final Mass
5%	4.60 cm	1.77 g	4.37 cm	1.45 g
2.50%	4.85 cm	1.89 g	5.00 cm	2.08 g
7.50%	4.93 cm	1.86 g	4.61 cm	1.60 g
Control	5.03 cm	1.93 g	5.34 cm	2.43 g
Trial Two	Initial length	Initial Mass	Final length	Final Mass
5%	4.10 cm	1.51 g	3.89 cm	1.10 g
2.50%	4.25 cm	1.66 g	3.98 cm	1.27 g
7.50%	4.03 cm	1.42 g	3.99 cm	1.18 g
Control	4.21 cm	2.28 g	4.60 cm	2.75 g
Outliers Trial One	Initial Length	Initial Mass	Final length	Final Mass
1%	4.22cm	1.33g	4.52 cm	1.65 g
10%	3.1cm	1.99g	3.98 cm	1.94 g
Outlier Trial 2	Initial length	Initial Mass	Final length	Final Mass
1%	4.1cm	2.1g	4.50 cm	2.37 g
10%	4.6ccm	1.33g	4.49 cm	1.29 g

how do we think about numbers?

Here's a cool radiolab that will make you rethink numbers.

osmosis at your fingertips

Class,

Here's the wikipedia article about water transport that explains the finger wrinkling that we see in the tub.

Scientific American has another response, although I find the lack of wrinkles in people with nerve damage a compelling argument against this.

Osmosis lab write-up.

Class, I'd like you to write up this osmosis lab.  Here's the data for 1st period
egg in water for 24 hours                   egg in syrup for 24 hours
61.94g to 69.04g                                60.13g to 56.51g
58.05g to 67.62g                                59.79g to 56.00g
58.30g to 75.52g  -eggshell broke      71.31g to 55.19g

7th period data

1.     Original mass: 74.63 grams

New mass: 85.07 grams

2.     Original mass: 69.34 grams

New mass: 78.38 grams

3.     Original mass (karo): 61.13 grams

New mass: 50.67 grams

8th period data

Corn Syrup

Before                After         

60.60g------------- 49.23g

63.8 g--------------56.8 g

70.21g--------------45.95g

Water

Before                After 

63.17g-------------69.59g

65.86g------------71.06g

Lab write up expectations:
Purpose
Brief procedure
egg data
explanations for changes in elodea (water plant), egg, and onion
Conclusion about osmosis

Have a nice weekend!  :-)

Class,

Here's the link to the Chapter 5 quiz .  The quiz scores are on the powergrade website so you can check in on this.  Please email this to me by Thursday.  (my email - worloff@uaschools.org)

By the way, there is not a problem with the question number 3.  I got confused because of all the negatives.  The question is actually correct (although there is still a problem with it that I'l speak to you later about).

Dr. Gallo's legacy

Another chapter in Gallo's story unfloded last year.  Here's the story .

AIDS, cell parts

Hello class,

The quickwrite for tomorrow will ask you a couple of questions.
1.  You saw a patient with Kaposi's sarcoma today.  This is an example of an opportunistic infection.  What is Kaposi's sarcoma and what is an opportunistic infection?

2.  What organelle is visible in this electron microscope image (in the lower half - about 10 microns long)?  What is its function?

Also, for those of you eagerly waiting, here's the link to the harvard video.  The 8 minute version is edited with dialogue to explain what is happening