by Howse, Jennifer.
[ ] Series: Simple machines Published by : AV2 by Weigl, (New York :) Physical details: 24 p. : col. ill. ; 26 cm. Subject(s): Levers --Juvenile literature. Year : 2013| Location | Call Number | Status | Date Due |
|---|---|---|---|
| Glen Stewart Elementary School | 621.8 How | Available |
Provides access to enhanced content that includes audio, video, web links, quizzes, activities, and a slide show.
Includes index.
What is a lever? -- Understanding force -- Force over distance -- How levers work -- Using levers -- Three classes of levers -- Levers timeline -- What is a crane operator? -- The two basic machines -- Seven facts about levers -- Levers brain teasers -- Science in action.
"Explains what a lever is, how levers work, and includes examples of past and present uses."--Provided by publisher.