Why is pluto now called a dwarf planet? pluto is a dwarf planet. a dwarf planet travels around, or orbits, the sun just like other planets. but it is much smaller. clyde tombaugh discovered pluto in 1930. he was an astronomer from the united …

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?