What are forces? -- Pushes and pulls -- Gravity -- Try this...moon cycle -- Friction -- Types of friction -- Try this... air resistance -- Movement -- Try this...moving objects -- Pressure -- Floating -- Simple machines -- Try this...pulley wheel.
Summary:
"Explains essential facts about forces and movement, including gravity, friction, pressure, and simple machines. Includes experiments"--Provided by publisher.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.