Some of the first experiments in cloud seeding were conducted by ...

[ap345]

Some of the first experiments in cloud seeding were conducted by Vincent Schaefer and Irving Langmuir during the late 1940s. To seed a cloud, they dropped crushed pellets of ____ from a plane.
   a. silver iodide
   b. silver iodine
   c. lead iodide
   d. cupric sulfide
   e. dry ice

Question 2

The idea in cloud seeding is to first find clouds that have too low a ratio of ice crystals to droplets and then to add enough artificial ice nuclei so that the ratio of crystals to droplets is about ____.
   a. 1:100
   b. 1:1,000
   c. 1:10,000
   d. 1:100,000
   e. 1:1,000,000

[onowka]

Answer to Question 1

ANSWER: e

Answer to Question 2

ANSWER: d