This activity from the Exploratorium provides a classic science demonstration of the buoyancy of a Cartesian diver, named after scientist René Descartes. A diver made from an eyedropper or Bic? pen is made to float, si...
This Exploratorium site contains an activity about afterimages, the lingering images seen after staring at a particular stimulus. Participants look at bird shapes of different colors for a while and then look away,...
This Exploratorium site contains an activity to produce images with a cylindrical mirror. The mirror is made of aluminized Mylar backed with construction paper. The site provides diagrams to explain the observed...
This applet displays the motion of two blocks. One of them is moving on a level surface and the other one along a curved surface, the curve of which can be changed. The initial velocity of the blocks, equal for the two...
This activity from the Exploratorium contains an introduction to diamagnetic materials like water that are repelled by both poles of a magnet. A rare-earth magnet is used to repel grapes, whose main component is water,...
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