Spinning Patterns

Make your own Spinning Patterns.

Materials

Mount a piece of paper on turntable. (If the turntable has grooves, cover it with cardboard). Start the turntable. Move the marker at a constant speed in a straight line from the center to the edge. The spiral curve that appears is called aspiral of Archimedes. Move your pen from the center at different speeds and notice how the spiral changes. Try drawing other straight lines: start at the edge and draw a line toward the center, or start at the edge and draw a line at a 45-degree angle. Draw straight lines with different constant speeds to make new curves. Draw many straight lines radiating out from a point halfway between the center and the edge of the turntable. Try to draw a triangle or a square on the rotating turntable.

For more details on this activity, go to
http://www.exploratorium.edu/snacks/blackboardrings.html