Question

Why does water form a spherical shape on wax paper, instead of spreading out flat?

Answer 1

Due to surface tension the water molecules are pulled towards one side due to the surface hence a spherical sale is formed.

Answer 2

Water does not stick to the wax. rather, the molecules inside the water pull on each other. This creates a force called surface tension. This force tries to pull the water into a shape with the least surface area for it's volume, a sphere.

Hope this helps!