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.
1 The world's largest desert is the Sahara in North Africa. 2  Areas of scrub land that border the desert are called desert scrub. 3  Mediterranean climates are not too hot or cold. 4  They are found around the Mediterranean Sea, near Cape Town in South Africa and Melbourne in Australia.