In this activity, students explore the ideas of surface tension and absorption by manipulating water drops on waxed paper, and comparing the results to regular paper.
Water and wax do not get along. Waxed paper pushes water away and does not absorb it.
The surface tension of the water pulls it into a little round blob; these blobs, or drops, can slide around waxed paper because the paper does not absorb it.
Water "prefers" to stick to itself (adhesion) more than it sticks to other substances (cohesion).
Wet and Dry Printable guide.
These activities are part of Science World's Big Science For Little Hands program. They were developed and tested with preschool and kindergarten educators.