Single Ply, Two-Ply and Three-Ply. Ply is how many yarns are twisted together to make a single thread. Fabrics can either be two-ply or single ply. Two-ply means that two yarns are twisted together to make a single thread that is then woven into the fabric. (Note that this is not at all like two-ply toilet paper!).
Stratovolcano. Mt Fuji is the highest mountain in Japan. The mountain has a base diameter of 50 km. Fuji Volcano consists of three volcanoes: Komitake, Ko-Fuji (Older Fuji Volcano) and the present Fuji (Younger Fuji Volcano). A summit crater is 500 m across and 250 m deep.
Snow-covered Mount Fuji, Japan's highest peak at 3,776-meter (12,385 feet), is seen from an observation platform in Gotemba, west of Tokyo, Japan, Tuesday, March 17, 2009.(AP Photo/Itsuo Inouye).