This is an interactive PowerPoint that would work perfectly on any interactive board or can be used simply as a projected item for whole-class review. It follows along with the C-Scope lesson plans for 4th grade. It covers the changes to the Earth, erosion, types of soil, plant biology, and more. You do not have to be following the C-Scope curriculum to find use for this.
Use it as a game (I always did boys vs. girls) or as a whole class review or even as a pre-quiz where the students write down their answers on dry erase boards and then hold it up for a quick check.
The answers are built right into the presentation.