Complex machines are made up of different kinds of simple machines . Simple machines do not contain many parts. Tools and simple machines have been used for many centuries to make work easier. All machines are used to make a job less difficult. They do so by allowing a small effort or force to be used to raise or move a heavier weight or to exert a greater force.
Objectives Examine and become familiar with nails and screws.
Name hardware and tools and the jobs they do. Suggested Books Beim, Jerrold. Tim and the Tool Chest . Tool Book . Holiday House, 1982.