Any additional ideas come to mind? Make a list and head to the library or to the computer to research before you forget!
If you still feel uncomfortable with your topic or the research process at this stage, feel free to meet with a tutor or reference librarian. Don't let too much time pass between receiving the rubric and coming up with a topic. Otherwise, other classmates may get your choice topic approved first, or you may not be able to check out the library books you need because someone else got them!
However, you also want to avoid getting too far into the research before getting your professor's approval of the topic. If s/he doesn't approve your topic, any research or work you've already done will have gone to waste. Instead of diving in right away, do some preliminary research --- gauge whether your topic is too narrow or too broad based on your assignment parameters. This will also give you an idea of the literature written on your topic and the sources you will use to satisfy the academic component of your presentation.
If you're still lost for chemistry topic ideas for college course presentations, you could always check out science museums, high school science fair competition topics and textbooks for inspiration. For more on giving college presentations, feel free to consult a tutor or a speech communication textbook. Additionally, for more on how to incorporate technology into a presentation, feel free to ask a tutor or a computer consultant on your campus or in the campus library.