Beads of water are formed by water vapor condensing.
Condensation is the change of water vapor to a liquid.
Vapor turning into a liquid leaves behind beads of water.
Where do beads of water come from?

a) Too much water
b) underground systems
c) When the water is too cold
d) Water spills
e) Vapor turning into a liquid
f) Warm air moving into cold air
g) At the peak of a mountain
h) To another location like underground