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 and engaging photographs help readers understand the differences between hard and soft materials.
This is Book 7 in the Properties of Materials Series. See all Properties of Materials books here.
See More Educational: Physics
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Lisa J. Amstutz is the author of more than 30 nonfiction books for children and many magazine and newspaper articles. Her background includes a B.A. in Biology and an M.S. in Environmental Science/Ecology. She loves sharing amazing facts about science and nature with kids.
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