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111Environmental radioactivity — is produced by radioactive materials in the human environment. While some radioisotopes, such as strontium 90 (90Sr) and technetium 99 (99Tc), are only found on Earth as a result of human activity, and some, like potassium 40 (40K), are only… …
112Diving watch — Omega Seamaster model 2220.80, with a water resistance of 300 m (1,000 ft). The second crown (at 10 o clock) is a helium release valve. A diving watch is a watch designed for underwater diving that features, as a minimum, a water… …
113Mollusc shell — Closed and open shells of a marine bivalve, Petricola pholadiformis. A bivalve shell is composed of two hinged valves which are joined by a ligament …
114Clickjacking — is a malicious technique of tricking Web users into revealing confidential information or taking control of their computer while clicking on seemingly innocuous web pages.[1][2][3][4] A vulnerability across a variety of browsers and platforms, a… …
115Rocky Mountain spotted fever — Pathol. an infectious disease characterized by high fever, pains in joints, bones, and muscles, and a cutaneous eruption, caused by rickettsii and transmitted by ticks: first reported in the Rocky Mountain area, but now more widely distributed.… …
116Animal coloration — Chapman s Zebras in Botswana, displaying their outline disrupting camouflage Animal coloration has been a topic of interest and research in biology for well over a century. According to Charles Darwin s 1859 theory of natural selection,[1 …
117Misconceptions about tornadoes — Windows and outer walls of the Bank One Building in downtown Fort Worth, Texas were damaged by the 2000 Fort Worth tornado. It is a commonly held belief that tornadoes can not strike downtown areas, but Fort Worth is just one of many cities which …
118Bubble Wrap — Infobox Brand logo= name=Bubble Wrap Brand type= currentowner=Sealed Air Corporation origin=flagcountry|USA discontinued= related= markets= world previousowners= trademarkregistrations= website=http://www.bubblewrap.com/Bubble Wrap is a pliable… …
119Batesian mimicry — is a form of mimicry typified by a situation where a harmless species has evolved to imitate the warning signals of a harmful species directed at a common predator. It is named after the English naturalist Henry Walter Bates, after his work in… …
120Potassium iodide — Chembox new Name = Potassium iodide ImageFile = Potassium iodide.jpg ImageFile1 = Potassium iodide 3D ionic.png IUPACName = Potassium iodide OtherNames = Kalium iodide, knollide, potide Section1 = Chembox Identifiers CASNo = 7681 11 0 RTECS =… …
