Does diversity in undergraduate research topics look bad on my graduate school application? I have done 5 different projects in my undergraduate course and all of them are from different areas/fields. My project work during High school is from a different area still. The reason of working in different fields is that I was trying to figure out what exactly interests me.
Having found that, I am interested in doing grad school after I finish my bachelors. 
Does the fact that I have done all my research projects in different areas say that I'm not sure what interests me?

UPDATE:If this is sounding vague, I'll clarify. My major is chemical engineering. I've done projects on Synthesis of nanoparticles, Bionanotechnology-Tissue Engineering, Analysis of a thermodynamic cycle, Microreactors and Reaction Engineering. 
I intend to apply for a program in Bioengineering/Bioprocess Engineering
Trying out several projects in different areas does not necessarily say that you do not know what interests you. You have to show them that you are interested in several areas and that you wanted to get an insight in order to obtain a wider range of possibilities.
I think that there are few people who immediately find the right area that fully interests them. It is important that you present it that way. Working on different projects brings more extensive experience in any case.
If you have then found the right area, you can deal with it more intensely.