If you've ever needed a PowerPoint to introduce the three kinds of rocks with examples and with basic vocabulary, this is the slideshow for you! Some slideshows include too much information for young children, but this one is, in the words of Goldilocks, "just right". There is also a brief description of the rock cycle with a diagram at the end.
This PowerPoint can also be modified to fit your own needs. If you need the 2003 version of the PowerPoint instead, please let me know. I have it, too.