Is It Smooth or Rough? by Lisa J. Amstutz

https://thebookvoice.com/podcasts/2/audible/115226 to listen full audiobooks. Title: Is It Smooth or Rough? Author: Lisa J. Amstutz Narrator: uncredited Format: mp3 Length: 3 mins Release date: 04-09-24 Ratings: 5 out of 5 stars, 1 rating Genres: Physics Publisher's Summary: 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, at-level text helps listeners understand the differences between smooth and rough objects.