The Light Depedent Reaction

Today we spent the bulk of class learning about the light dependent reactions. Click on the picture below to link to the video clip we watched in class.


You have no homework over academic travel. It would be ideal if you reviewed your photosynthesis notes before coming to class on Monday.

Photosynthesis Overview

Today we did an overview of photosynthesis. Homework: Read section 8.3 and take notes for a reading quiz.

F Block Lab Data

Above is your data table, it was also emailed to you after class. Please make a graph, include the labels and write a two paragraph discussion.

D Block Lab Data

D Block Lab Data:

You need to make a line graph for the data above. Make sure to label the graph. You also need to write a two paragraph discussion INTERPRETING your data and discussing sources of error.

G Block Lab Data

Today we used the pH probes to examine the effect of various concentrations on the rate of diffusion. Homework: Use the data below and create a graph of what happened over the course of three minutes to the pH of the water (outside the dialysis tubing). Click the picture to make it larger. You can make your graph on paper or in Excel. Make sure to label the x and y axis properly and make a title.

You also need to write a two paragraph discussion. This is due on Friday.

Dialysis Tubing Lab Procedure

Today students learned how to work with the dialysis tubing and set up their experiments to examine the relationship between concentration and the rate of diffusion.

Homework:
Write a detailed procedure for the lab you did in class today. You will be giving your procedure to another group to use tomorrow. You will be graded on how successfully the other group can follow your procedure.

Test Today

Today students had a test on Chapter 7: Parts of the cell, osmosis and diffusion.

The big news is: the dialysis tubing has now arrived! Instead of pushing ahead with photosynthesis, we're going to do a lab tomorrow using the Vernier probes we learned how to use last week.

In this lab, you will look at how concentration effects the rate of diffusion.

Homework:
Make a prediction for how you think concentration effects the rate of diffusion. In your prediction make sure to include a definition of diffusion and an explanation of the principle.

In addition, you will need to write a procedure to use in class tomorrow for this experiment. Below are some experimental guidelines:

Each pair will have:
a Vernier pH Probe and lab base
Three unknown samples to test
dH2O
You should set your probe to follow the guidelines we did in class (3 minutes, 20 samples per minute).

Today we started chapter 8: Photosynthesis. To get us started, we watched this video:



While some of you might call it lame or childish, it's catchy and has some helpful hints about photosynthesis. Click here to see the video of the Earth breathing that we watched.

Homework: Study for your test on Monday.

Learning to use Vernier Labquest Probes

Today we learned how to use the Vernier Labquest Probes. We will be doing an experiment using dialysis tubing to examine the rate of diffusion in relationship to the molarity of a solution. As soon as the dialysis tubing arrives we'll go back to osmosis and diffusion and do the lab. In the meantime, we'll move forward to chapter 8: Photosynthesis.
Homework: Study for your test on Monday.

Osmosis and Diffusion

Today students had a different type of reading quiz, where they needed to used Bloom's Taxonomy to write their own reading quiz questions.

After the reading quiz we finished the chapter 7 packet by wrapping up osmosis and diffusion.

Homework: Click the picture below to be taken to the website you'll use to complete your homework.

Cell Membranes

Today we recapped the parts of the cell and learned about the structure of a cell membrane.
Homework: Read section 7.3 and take notes for a reading quiz.

Cell Part Want Ads

Today we finished the overview of the cell parts and students worked on making want ads for the cell.
Homework: Finish your want and complete the test corrections. You can find instructions for test corrections here or read the post below this one.

Test Corrections Due Monday

On Monday your test corrections are due. What does this mean?

You need to rewrite each question you got wrong AND write the correct answer.

For example if you got Question #6 wrong, you would write:

#6. When a protein becomes denatured it changes from the _____ structure to the _____ structure.

d. tertiary to primary.

The more questions you got wrong, the more work you have to do.

Test Today

Today students had a test on Chapter 2. Some people did really well, other people not so much. Tomorrow we will be starting a new unit on cells with Chapter 7.

There is no homework tonight.

Catalase Lab Analysis & Review

Today students answered the following questions about the lab we did on Friday. Once they finished analyzing the lab, they were able to start on a review packet for the test.

1. Based on what you know about the guidelines for writing a scientifically accurate title, write a title for this lab.

Below is a table of raw data from all three classes for the Potato Catalase Lab. Note: all units are in cm. Be sure to include units in your answers for all the questions.

sample	Hot	Room Temp	Cold
1	0.1	5.8	3.4
2	0	4.7	5.3
3	0.1	5	6
4	4	8	6.8
5	0.1	3.9	5.9
6	0	2.8	4.2
7	0	4.5	8
8	0	5	4.8
9	0.2	4.5	5.5
10	0.1	3.5	5
11	0.2	4	1.5
12	0	2	5

2. What is raw data?

3. True or False: you should include raw data in your discussion section of your lab reports? (circle one answer).

4. What is the average height of the bubbles for the hot group _______________?

5. What is the average height of the bubbles for the room temperature group _____________?

6. What is the average height of the bubbles for the cold group ______________?

7. What do you suppose could be an explanation for the anomaly in sample 4?

8. What biological concept did this lab illustrate? Write your answer in at least three complete sentences.

Test on Tuesday

For your test on Tuesday you are responsible for all of chapter 2. You should also review the handout on enzymes, as this information is not in your book. The test will have multiple choice questions, true/false and open response questions. Approximately 80% of the points will be for questions from chapter 2 and the other 20% of points will relate to the lab work you have done so far.

Potato Catalase Lab

Today students examined the effect of temperature on potato catalase, which is an enzyme. Using hydrogen peroxide which reacts with catalase to create bubbles, students were able to see that when catalase is denatured by a heat source, no bubbles are formed.

On Monday we will be analyzing the data on the height of the bubbles from all three sections. We will also be reviewing for the chapter 2 test, which has now been moved to Tuesday.

Homework: study for your test.

Plan for the rest of the week

Today we will be finishing the macromolecules lab and starting to learn about enzymes. On Friday we will do a mini lab looking at the effects of temperature on enzyme function. On TUESDAY you will have a test on Chapter 2.

Homework: Click through the PowerPoint below. Write the procedure for Friday's lab in your notebook.

Potato catalse lab

View more presentations from ilanasaxe.

Testing for Macromolecules

Today we started testing various foods for macromolecules. Tomorrow (or Thursday) we will continue testing and wrap up the experiment.

Homework: none.

Click the picture to read about what we did in class and for more information on macromolecules in food.

Turnitin.com

You will need to check your TASIS email for the class ID and password to join turnitin.com.

You can read a sample lab report here. NOTE: The discussion in that sample lab report is not long enough. It's only a little bit more than half a page, with 1.5 spacing. Your discussion needs to be an entire page.

In case you forgot to read what a discussion should include, read the excerpt from the Colby College Guide to Writing Scientific Papers, below.

Here, the researcher interprets the data in terms of any patterns that were observed, any relationships among experimental variables that are important and any correlations between variables that are discernible. The author should include any explanations of how the results differed from those hypothesized, or how the results were either different from or similar to those of any related experiments performed by other researchers. Remember that experiments do not always need to show major differences or trends to be important. "Negative" results also need to be explained and may represent something important--perhaps a new or changed focus for your research.

A useful strategy in discussing your experiment is to relate your specific results back to the broad theoretical context presented in the Introduction. Since your Introduction went from the general to a specific question, going from the specific back to the general will help to tie your ideas and arguments together.

Remember that your discussion should have a title that follows the guidelines we talked about in class. I don't want to read anything titled "Salty Pea Lab."