More than 70 percent of our world is covered in water. But how did it all get there? Oceans and lakes formed over millions or even billions of years, and they are always changing. Explore more about these landforms with easy-to-understand content tied to the curriculum of upper-elementary and middle school students and text written at a 2nd to 3rd grade reading level. Dyslexia-friendly font and design make learning accessible, and a recap at the end promotes checking for understanding to aid in comprehension. It's key geology curriculum made approachable for all.