expo and bleach

Okay so today in my component SCIENCE AFTER SCHOOL, we are testing bleach with different types of markers. There are people writing on green ,yellow and red YES shirts. They are writing on them in different types of markers like EXPO, EXPO VIS-A-VIS, and other types and then dropping bleach on the shirt over the writing. We as a group came up with questions as a result of individual groups testing certain types of markers; my group did regular colored expo, then we all came up with questions and put them into the catogories of Testable or non testable. Now we are testing our testable questions. We'll see what happens with those shirts and those questions we tested next time I blog.