Digital videos are provided in several playback formats to match a variety of Internet connection speeds. Visitors having the lowest baud rate connections, such as 14.4K, 28.8K, and 56.6K modems should use one of two download versions that have been compressed specifically for viewing at these slower rates. Faster connections, such as T1, cable modem, or DSL can take advantage of slightly higher quality versions of the videos that download much faster and are presented in a larger format. We invite our visitors to download and enjoy these digital microscopy videos and to even use them in the classroom. Chemical Crystals - Chemical compounds can exist in three basic phases, gaseous, liquid, or solid.
Gases consist of weakly bonded atoms and expand to fill any available space.
Solids are characterized by strong atomic bonding and have a rigid shape. Most are crystalline, having a three-dimensional periodic atomic arrangement. Some, such as glass, lack this periodic arrangement and are noncrystalline, or amorphous. Liquids have characteristics that fall in between gases and solids. This cinemicrographic collection presents time-lapse movies of various chemical compounds as they change physical states.