Doing presearch is always a good idea!
What is presearch? It's the activity of doing an initial background check on facts and ideas relating to the topic you are studying or reporting about.
So, for a paper on volcanoes, you may want to see what the Q&A community has had to say about them - for an initial idea and direction - and then delve deeper on Answers.com or another research site.
You may even find real, live WikiAnswers experts on the topic you are writing about! Remember: Wikianswers is not a place where you get your homework done. Questions that are directly aimed at helping yourself with your homework or school work may be deleted.