A series of twenty non-fiction science readers which engages children in the world around them. What causes floods? Why do volcanoes erupt? What is the difference between a volcano and an ice storm? You can find the answers to these and other questions about extreme environments in Why Do Glaciers Move?
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.