When Does an Avalanche Occur?
An avalanche occurs when a mass of snow which has built up on a mountainside begins to slip and finally to fall. There can…
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Destruction
When Does a Firestorm Occur?
A firestorm occurs when flames from a large number of individual fires merge into a single convective, or circulatory, column. This produces
When Is War Said to Escalate?
When Is War Said to Escalate? War is said to escalate when it increases rapidly in scale or intensity. The word was added to the military vo
Where Is Pompeii?
Where Is Pompeii? For nearly 1,700 years Pompeii in southern Italy was a dead and buried city, forgotten by all except historians. But for m
Why Is Milk Pasteurized?
Why Is Milk Pasteurized? Milk is an excellent medium for microbial growth, and when stored at ambient temperature bacteria and other pathoge