BioLAB8.pdf - Eliana Klein Professor Cuesta-Sanchez Biology...

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Eliana Klein Professor Cuesta-Sanchez Biology Lab 17 November 2016 Lab 8 assignment 1. Define Brownian movement. (10 pts) The random motion of particles suspended in a liquid gas resulting from the collision with the fast moving atoms or molecules in the gas or liquid 2. Order ice, liquid water, and vapor from high to low random thermal motion. (10 pts) Vapor(fastest), liquid water, ice(lowest) 3. In procedure 9.3, a dialysis bag containing starch is submerged in a beaker filled with water containing few drops of iodine. Describe color changes in and out of the bag. Explain why these changes occur. (15 pts) The color changed in the bag to a dark blue/black color, showing that the iodine in the beaker was able to move through the pores in the bag (meaning the particles were small enough to fit through the pores) and interact with the starch in the bag. These changes occurred because the iodine was able to penetrate through the dialysis bag and interact with the starch.
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