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chlorine
The chemical element chlorine is a poisonous, corrosive, greenish-yellow gas that has a sharp, suffocating odor and is 2 times heavier than air. Chlorine—along with fluorine, bromine, and iodine—belongs to the group of elements called halogens. The halogens combine with most metals to form ...
 | computer
Generally, a computer is any device that can perform numerical calculations—even an adding machine, an abacus, or a slide rule. Currently, however, the term usually refers to an electronic device that can perform a series of tasks according to a precise set of instructions. The set of instructions ...
| Minsk
Until July 27, 1990, when Belarus declared its sovereignty, Minsk had been the capital of the Belorussian Soviet Socialist Republic since 1919. It was also the administrative center of Minsk Oblast. Now the capital of Belarus, Minsk is situated in the central part of the nation. It lies on gently ...
| oak
The majestic monarchs of the forest may take 100 years to reach maturity and then may live for another 900 years. Their wood provides one of the strongest and most durable of timbers.
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