Howse, Jennifer.

Levers / Jennifer Howse. - New York : AV2 by Weigl, 2013. - 24 p. : col. ill. ; 26 cm. - Simple machines . - Simple machines. .

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.

ISBN: 9781621274254 (lib. bdg.) 20.39

Source: Knowbuddy Resources

LCCN: 2012041019

Subjects--Topical Terms:
Levers--Juvenile literature.

Dewey Class. No.: 621.8/11