Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a nucleus of an unstable atom loses energy by emitting radiation. A material that spontaneously emits such radiation â which includes alpha particles, beta particles, gamma rays and conversion electrons â is considered radioactive.
Best Answer: Four of the larger Australian deserts are the Great Victoria Desert, the Gibson Desert, the Tanami Desert and the Great Sandy Desert. That accounts for most of the west of the continent, nearly two-thirds. Name four states that would be included in at least one of the North American deserts.
Desert Physical Features. Arabian desert: Covered almost entirely by sand; has some of the most extensive stretches of sand dunes in the world. Australian desert: Great Sandy, Victoria, and Simpson are sandy; Gibson and Sturt are stony. Chihuahuan desert: High plateau covered by stony areas and sandy soil. Many mountains and mesas.