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
USF Biologist Taegan McMahon conducts experiments on chlorothalonil at a research facility in East H
Artist's conception of the birth of a star within a dense molecular cloud.
An illustration of the helium atom, depicting the nucleus (pink) and the electron cloud distribution
In the 1960s, social psychologists did highly creative but controversial experiments. This photo, ...
Cloud Types: High Clouds
Modern-day dust cloud blowing from Africa’s Sahara