Why are pans and plates smooth? Why do tires have treads? What is friction? Read `Smooth and Rough' to find out! Learn what materials are naturally smooth, why some smooth surfaces are slippery, and how friction affects speed. Each book in the `My World of Science' series explains science that you see in the world around you and use every day.
Kids will love this hilarious fairy tale adventure packed with clever twists, familiar characters and page-turning fun.
The second book in a fabulous new magical, middle-grade series filled with adventure, wonder and wildness,
This is Book 20 in the Young Explorer: My World of Science Series. See all Young Explorer: My World of Science books here.
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Angela Royston has written many books for young people, including books about people at work, animals, health and the environment.
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