Smooth and rough /
Angela Royston.
- Chicago, Ill. : Heinemann Library, c2003.
- 32 p. : col. ill. ; 23 cm.
- My world of science .
- Royston, Angela. My world of science. .
Includes bibliographical references and index.
What is smooth? -- What is rough? -- Naturally smooth -- Smooth cloth -- Smooth and hard -- Easy to clean -- Making something smooth -- Slipping and sliding -- Wet surfaces -- Treads -- Friction -- Testing surfaces -- Using rough surfaces.
A simple explanation of the physical properties of smooth and rough objects, including examples of them in everyday life.