Learners will understand how saws have sharp teeth that cut through wood. A back matter spread explains how saws are a kind of simple machine: a wedge.
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.