The reason hard boiled eggs dont last as long as raw eggs is that in cooking the eggs, a natural protective chemical layer (produced by the mother hen) is washed off the porous eggshell, allowing germs to enter. Source(s): http://cookery.newarchaeology.com/how_lo... sugarice82 Â· 9 years ago.
Freebase(0.00 / 0 votes)Rate this definition: Song cycle. A song cycle is a group of songs designed to be performed in a sequence as a single entity. As a rule, all of the songs are by the same composer and often use words from the same poet or lyricist.
What is the Rock Cycle? Like most Earth materials, rocks are created and destroyed in cycles. The rock cycle is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. All rocks are made up of minerals. A mineral is defined as a naturally occurring, crystalline solid of definite chemical composition and a characteristic crystal structure. A rock is any naturally formed, nonliving, firm, and coherent aggregate mass of solid matter that constitutes part of a planet.