Lettuce Seed Bioassay

2.27.2014

Lettuce Seed Bioassay setup <----download for viewing in .xps format

Today we will set up the study, and tomorrow we will add the seeds.

http://glencoe.mcgraw-hill.com/sites/0012083252/student_view0/chapter8/practice_quiz.html

Calculating Toxicity of Household Items

First, here's a copy of the 6 weeks test.

Your rationales for the questions you missed are due tomorrow.

6 Weeks test for rationales

Rationales include:

1. Justification for the one right answer.
2. Justifications for why all other answers are incorrect.

Your homework is to bring one household chemical (small quantity in a baggie or container).

You need to research the MSDS (Material Safety Data Sheet) for this material and find:

1. Toxic Substances as defined by OSHA
2. LD50 for an adult rat.
3. Calculate LD50 for yourself.

Here's the procedure for calculating LD50:
http://teacherweb.com/CA/UniversityCityHighSchool/MrsTaraHowell/CalculateforLD50lab.pdf 

Follow all three steps to convert to grams. 

Here's an example:

I Googled "Mr. Clean Bathroom Spray" and was taken to the Procter and Gamble site which provided the MSDS
http://teacherweb.com/CA/UniversityCityHighSchool/MrsTaraHowell/CalculateforLD50lab.pdf

I took this information from the website:

SECTION III - COMPOSITION AND INGREDIENTS
Hazardous Ingredients as defined by OSHA, 29 CFR 1910.1200 and/or WHMIS under the HPA:
Chemical Name	Common Name	CAS No.	Composition Range	LD50
2-Hydroxy-1,2,3- Propanetricarboxylic Acid	Citric Acid	77-92-9	3-7%	Oral (rat) > 3 gm/kg
Butoxy Propoxy Propanol	Dipropylene Glycol n-Butyl ether	29911-28-2	3-7%	Oral (rat) > 3.5 g/kg
N-(3-Cocoamidopropyl)- N,N-dimethyl-N-carboxymethyl betaine	Cocamidopropyl Betaine	61789-40-0	1-5%	Dermal (rat) > 2g/kg

Since 2 grams is the lowest lethal dose, therefore I will calculate based on this dose:

Step 1: Convert my weight to kg

135 lbs x  1 kg/ 2.205 lbs = 61.22 kg

Step 2:
61.22 kg X 2000mg/kg = 122440 mgLD50

Step 3:
122440mgLD50 x 1mg/1000 g = 122.44 g/person 

Toxics worksheet

Work on e-learn/notes for Chapter 8. The Powerpoint is on Class Jump...

 

 

HOMEWORK!!!

 

Toxics Worksheet                                                                              

Go to www.scorecard.org.

Type in a zip code and complete the following.

Write the answers on a sheet of paper and place in your folder. 

I - Toxics

A.    List the top three toxic polluters in the county.  How much? (in tons)

 

1.      _____________________                        ___________

2.      _____________________                        ___________

3.      _____________________                        ___________

 

B.     What are the top three toxics released?  How many tons?

 

1.      _____________________            _____________

2.      _____________________            _____________

3.      _____________________            _____________

 

C.     Are there any Superfund sites in your county? List them.

 

D. Print and attach map of Superfund sites. (If you have any.)

 

II – Air

A.    How many days a year is your air healthy? __________

 

B.     List the top three air polluters in your county.  How many tons?

 

1.      _____________________            _____________

2.      _____________________            _____________

3.      _____________________            _____________

III – Water

            A. How many watersheds in your county?   _________

           

B.     List them and indicate the Characterization Category.

 

 

C.     Animal Waste Summary

 

1. Total animal head                            ___________________

 

2. Total amount of waste                  ____________________ tons/yr

 

3. Total Volume of waste                   ___________________ gallons/yr

  

Review for 6 weeks test!

Tues
Chapter 20 Quiz



Chapter 15 Quiz

Wed

Chapter 17 Quiz

Chapter 18 Quiz

Thurs

Chapter 16 Quiz

AP Registration.

This is your honey-do list this week:

Lab report for Schoenbein Ozone test is due Monday.
Study Guide for Chapter 16 is due today.
Chapter 16 test is due before class tomorrow.
5 page paper over Renewable Energy is due by next Friday, Feb 21.
6 weeks test is next Thursday.

GREAT NEWS: All AP Tests are free to you this year! DISD is covering all costs!

What's more? Every student who earns at least a 3 on this test gets a check for $100 in July!

I will drop a grade this 6 weeks for each prep session for which you register. 3 registrations = 3 dropped grades 

More grade incentives will follow for attendance. These sessions are proven to raise scores.

Send confirmation of your registration to tmegahan@dallasisd.org 

AP Science Prep Sessions

2014

Student Registration

1. Go to the DISD Home page

2. Select departments from the top menu bar

3. Click “Advanced Academic Services”

4. Navigate to the right – “In the Spotlight”
5. Spring AP Science Prep Sessions –click here
6. Fill in all areas then “Submit”
  

Deadline to complete registration – February 19

Ozone Lab Redo

http://www.ferndale.wednet.edu/fhs/departments/envsci/Ozone_Testing_Lab%20.pdf

Tropospheric Ozone Lab Report due Tuesday

Things to avoid in writing your papers.
http://www2.ivcc.edu/eng1002/tip_formal_writing_voice.htm

This weeks reminders

2/11/2014

Tuesday's FRQ is:

2009 #1

We will work on the study guide to Chapter 16 on Thursday in class. If you are in ROTC you need to complete this at home.(Good luck on your inspection!)

8/6/2014


Advances in Solar technology.

Today's Free Response is

Carbon Lab

http://www.learner.org/courses/envsci/interactives/carbon/

Start by downloading the document! 

Link to free response answer can be found for Lead and Carbon Monoxide

Carbon Monoxide, Lead, and Ice Cores

Feb 4, 2014
Groundhog Day 2014 was Sunday.

Today's free response is 1999 #3. 

Habitable planet has a video on evaluating climate data from ice cores. The powerpoint for chapter 16 doesn't really cover this. You need to add this to your notes. This video can be viewed at:

http://learner.org/courses/envsci/unit/text.php?unit=12&secNum=1

You want to start around 8 minutes.

Chapter 16 is due next Friday.  Valentine's Day, 2/14/2014.