Students will be able to identify each simple machine. Students will calculate the formulas used with simple machines. Students will access the internet and communicate through e-mail to search for and share information on machines. A machine is a device that does work. Machines do not increase the amount of work done, but they do make work easier.
Machines make work easier by changing force or distance, or by changing the direction of the force.
The wheel and axle , the wedge , and the screw are modifications of the three simple machines. A complex machine is a machine made up of two or more simple machines. This site provides basic information regarding the history and uses of the screw over the centuries, including images. The Boston of Science Home page which includes a list of exhibits, teacher resources, on-line exhibits, and programs. This site actually provides units on simple machines including criteria, outcomes, and sample lessons.