BLAST LAB
PREP
IF YOU DO NOT COMPLETE THIS PRELAB WELL YOU WILL NOT BE ALLOWED TO PERFORM IT
1) Read background and lab instructions starting on page S51-S60
2) Watch these videos:
http://www.youtube.com/watch?v=2Th0PuORsWY&feature=related
This video demonstrates the diffusion of iodine through dialysis membrane into starch.
http://www.youtube.com/watch?v=xQ9DWem9l_8&feature=related
http://www.youtube.com/watch?v=DRHKq0piN0M&feature=related
These videos show the diffusion of glucose through dialysis membrane with explanation.
http://www.youtube.com/watch?v=VK-_YHakvho
http://www.youtube.com/watch?v=zHyfDGVNdvM&feature=related
These resources show plasmolysis in Elodea cells under the microscope.
http://www.youtube.com/watch?v=DpVbcJY4amA
http://www.youtube.com/watch?v=1vQzqk2hzj8&feature=related
These videos show an osmosis experiment in decalcified eggs (2 parts) using water and corn syrup. They reveal
ways to measure the egg sizes and make good observations about the water and corn syrup before and after the
incubation period.
3) Summarize background
4) Answer questions at the top of page S54
5) List learning objectives
6) Starting from page S54, copy procedures/materials and answer all questions that can be answer prior to completion
of procedure
7) Come to class understanding the requirements of the lab.
REQUIREMENTS
1) Prelab (25 points)
2) You must come to the lab after school and with help of instructor, you gather materials and prepare your own
solutions and setup (5 points)
3) You then perform investigations yourself. Some of the investigations require you to develop the method (25 points)
4) Temporary Results / Data Collection Sheets (5 points)
5) Organized Results with Graphs / Charts / Word Summaries (10 points)
6) Conclusion Explaining Results / Limitations / What was learned / Answers to Post-Lab Question in Instructor’s
Manual (25 points)
The setup day for this lab will be Friday (1/10/14) after school. Pre lab is due that day for any students participating.
You must sign up by class on Friday morning if you are coming. The lab must be performed during lunch, school
hours, or after school on the week of Monday (01/13/14). The final report is due by 1/20/14.
Successful completion of this lab will be worth the equivalent to a test grade next quarter. You must do at least 2 out of
6 after school labs will be due next quarter. This is your first chance. Extra labs will be worth extra grades.