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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Mass
What Are Ingots?
Ingots are blocks of cast metal from which other things are made. You have probably heard of cast iron. Casting is the process by…
What Is Energy?
Energy is the power to act. There are several different forms of energy, and one kind can be changed into another kind. But although it can
When Does an Atom Split?
An atom splits when it is struck by a neutron. The nucleus of the atom then breaks into two roughly equal parts and, at the same time, shoot
What Is the Uvula?
What Is the Uvula? The uvula is a small mass of muscle covered by mucous membrane that hangs down from the middle of the soft palate at the