Describes experiments that can be performed using rocks to demonstrate their properties, including how they are formed, how to test their hardness, and whether rock layers can be changed by events such as earthquakes.
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.