“Wedges cut or separate objects,
” “Force is put on one part of the lever. Another part of the lever lifts the load.
Clear, concise text, easy-to understand graphics, and dynamic photos with labels help early readers grasp basic mechanical concepts. Real world examples of simple machines at work. Includes glossary, index, and further resources. Paperback, 24 pages.
Ages 4 - 8.
Titles in series listed below