Sally M. Walker 
Researching Rocks [EPUB ebook] 

Audisee(R) e Books with Audio combine professional narration and text highlighting for an engaging read aloud experience! Rocks can be made of many different minerals. By looking at rocks closely, we can tell where they were formed and what conditions they were created in. How do we know these things? And how do we tell different types of rocks apart? Learn about ways to research rocks and what they can teach us about our world.