Begin by watching the video on the left. Find out about how rocks on Earth form and change and how scientists group them into three different types. Next, look around for some different kinds of rocks. Tap the button. Can you find any of the rocks from the checklist? Use a tool to mark off any that you've spotted. *Optional: Use the :camera: tool to take a picture of some rocks that you found and the tool to show what kind of rocks you think they are. Finally, tap the to share your work with me!