Is It Hard or Soft? by Lisa J. Amstutz

https://thebookvoice.com/podcasts/2/audible/115227 to listen full audiobooks. Title: Is It Hard or Soft? Author: Lisa J. Amstutz Narrator: uncredited Format: mp3 Length: 3 mins Release date: 04-08-24 Ratings: 5 out of 5 stars, 1 rating Genres: Physics Publisher's Summary: A nail is hard. A cotton ball is soft. Why are some objects hard and others soft? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between hard and soft materials.