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