Focusing on the six simple machines--levers, wheels and axles, pulleys, screws, inclined planes, and wedges--this fun and informative series introduces young readers to several basic concepts of physics--such as work, force, gravity, and friction. Includes easy-to-do experiments, colorful photographs, clear text, and fun activities. Supports the national science education standards Unifying Concepts and Processes: Evidence, Models, and Explanation; Unifying Concepts and Processes: Form and Function; Science as Inquiry; Physical Science; and Science and Technology as outlined by the National Academics of Science and endorsed by the National Science Teachers Association.
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3-inch mark ADULTS ON SHARING Andy King broom Burnie called a lever Chapter children's literature complicated machines downward force downward push easier easy to lift first-class lever force and move force fulcrum Levers force moves fulcrum is close glossary goes harder to lift help you move helps readers find high end index helps readers kind of lever lever can't hold lever is called lever rests lever's load levers help lift a friend Lift the end lift the load little force load is closer load moves load SECOND-CLASS LEVER lot of force machines are called move an object moves a lot Moving the fulcrum Northern Illinois University Notice how high object a lever object you want photographs Pruning shears Put the crayon Putting the fulcrum quiz readers find information Roseann Feldmann ruler ruler's 6-inch mark ruler's end seesaw SHARING A BOOK simple machines tabletop third-class lever vacuum cleaner wheelbarrow Word Detective