Add Item to wish list Add Item to wish list

By Lisa J. Amstutz

Premium Members save an extra 10% and all Members collect stamps to save with Rewards. 10 stamps = $5.Learn More

Formats

See All Formats & Editions

In stock

This item is currently out of stock online.

Free standard shipping on orders over $60

Select a store to view item availability.

Overview

A piece of silk is smooth. Tree bark is rough. Why are some objects smooth and others rough? Find out in this series about materials and their properties. Informative, atlevel text and engaging photographs help readers understand the differences between smooth and rough objects.

Is It Smooth or Rough?

Overview

Product Details

Categories