The Process of Cloud Seeding Is Based on the Theory

Multiple Choice

The process of cloud seeding is based on the theory that:

A) silver iodide crystals act as freezing nuclei and enhance the Bergeron process.
B) silver iodide crystals make droplets heavier than usual so that they fall to the ground.
C) warm clouds will produce more rain if droplets are encouraged to freeze inside the cloud.
D) it is impossible to add too many freezing nuclei;the more you add,the more rain will fall.