What I did in Class Yesterday and Today + a Picture Gallery of my Materials

My 3 test tube racks: 1 without UV light, 1 with UV light for 7 hours, and another with UV light for 2 hours

Box under which my Elodea will be exposed for 7 hours.

Box under which my Elodea will be exposed for 2 hours.

My dissolved oxygen sensor.

  Yesterday in class I labeled 8 test tubes of water for my Elodea. Each of my strands of Elodea are approximately 6 1/4 inches long. The water in each tube just barely skims the top of the Elodea. I labeled 4 test tubes which will be exposed to UV light- two for 2 hours, and two for 7 hours. I labeled another 4 test tubes of Elodea which will not be exposed to UV light.
I could not begin my experiment today in class because I made a mistake yesterday. I labeled and filled test tubes 7 and 8 (without UV) with water. They were not necessary since they won't be exposed, so I really only need two without UV. Both to be tested, to make sure that I get the same result. Nevertheless, I'll be using them.
Also yesterday, I learned about using a dissolved oxygen sensor. Ms.Minn tested the dissolved oxygen in a container of water, and it tested 30% oxygen.
I am getting ready to put my test tubes of de-chlorinated water and Elodea under the box. Above are some pictures of my materials that I took today.