Have you tried Wordle yet? It is a word cloud you make from any text. Here’s one I made by copying and pasting the directions from your poster project.
This is a great way to study. Open up your online textbook or other online resource you are using and copy some of the text to your clipboard. Open Wordle (http://www.wordle.net/), click create, paste your text and hit go. Your word cloud will appear. You can also type in your own text if you wish. The larger the words the more often they were used in the text.Use the editing tools to change the look. Have some fun. Print your Wordle.
Now try to make some sense out of the words. Start with the easier things first like define all the larger words (volcanoes, mountains, plate, boundaries, edges, tectonics, etc). Then pick a few words and determine how are they related? For example how are ocean, plate, and volcanoes related? What else do you know about them?
Bring your Wordles into class.

wordle is cool
i was lookig at it yesterday..lol