" The Big Picture!" by Mr C

Last lessons Objective

Osmosis

Contrary to rumour..you still have to do this lab right!

Finding the isotonic solution to match a sweet potato

1.   Designing a lab to test osmosis in a living thing

2.   How to make a percent concentration

3.   Making graphs to compare change in mass with time and change in mass with concentration

Number One

So what examples of labs are online?

http://baileycraddockapbio.weebly.com/osmosis-and-diffusion.html

Should you salt fries before or after cooking?

http://science-mattersblog.blogspot.ca/2011/05/osmosis-should-i-salt-my-french-fries.html

Research on how to learn and evaluate the idea of osmosis.

https://www.nabt.org/websites/institution/File/pdfs/publications/abt/2007/069-02-0031.pdf

McDonald’s story about “fries”

http://gizmodo.com/5953061/how-mcdonalds-makes-its-delicious-french-fries

The Quest For French Fry Supremacy

http://www.cookingissues.com/2010/04/27/the-quest-for-french-fry-supremacy-part-1/

Number Two

To calculate the mass percent or weight percent of a solution, you must divide the mass of the solute by the mass of the solution (both the solute and the solvent together) and then multiply by 100 to change it into percent.

The science behind why we use percent solutions in biology

http://www.physiologyweb.com/calculators/percent_solutions_calculator.html

How does using molarity differ from percent solution

a)    A comparison

http://www.dummies.com/how-to/content/how-to-measure-concentration-using-molarity-and-pe.html

A concept explaination

http://www.chem1.com/acad/webtext/solut/solut-1.html

How to make a best fit line

http://serc.carleton.edu/mathyouneed/graphing/bestfit.html

Youtube

https://www.youtube.com/watch?v=ugmhjwAQDIE

How to handle scattered data

http://www.saburchill.com/IBbiology/ICT/dataprocessing/022.html

Number Three

Contrary to previous experiences..a lab report is not a cookbook recipe.

These are some examples:

http://uca.edu/writingcenter/files/2012/06/TS-Bio-Lab-Report-3.pdf

http://biology.about.com/od/biologylabhowtos/a/labreports.htm

http://www.wikihow.com/Write-a-Biology-Lab-Report

Special Notes

1)   Introduction: always discuss the problem you are trying to solve and a testable idea (the hypothesis)

2)   In materials and methods: Be specific so that you can go back and find sources of experimental error.

3)   Discussion and Results: This is the section where you manipulate and discuss the data and the lab. In the discussion you can look at sources of error.

4)   Conclusion: Always discuss in a simple statement the following three things:

a)   How did your lab results relate to you testable idea.

b)   What are the specific sources of error?

c)    What variable could you use for a follow up lab

http://www.123helpme.com/view.asp?id=148775

http://gwbiology.wikispaces.com/file/view/investigation01_annotated_en.pdf

https://en.wikibooks.org/w/index.php?search=osmosis&title=Special%3ASearch&go=Go

Sample questions on osmosis

http://www.scienceprofonline.com/vcbc/diffusion-osmosis-test-qu.html

Simple quiz

http://www.proprofs.com/quiz-school/story.php?title=diffusion-osmosis_2

Diffusion quiz

http://biologycorner.com/quiz/qz_diffusion.html

·      If you are going to do a job..might as well do it right (make up lab time after school)

·      Sadly, sleeping on you text book is not like osmosis, information doesn’t just flow into your brain.

·      “I give up” is not a viable option