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The purple martin ( Progne subis) is a passerine bird in the swallow family Hirundinidae. It is the largest swallow in North America. Despite its name, the purple martin is not truly purple. The dark blackish-blue feathers have an iridescent sheen caused by the diffraction of incident light [2] giving them a bright blue to navy blue or deep ...
A smoke grenade is a canister-type grenade used as a signaling device, target or landing zone marking device, or as a screening device for unit movements. [1] [2] Smoke grenades are generally more complex and emit a far larger amount of smoke than smoke bombs, which are a type of firework typically started with an external fuse rather than a pin.
AMP Energy — Powered by Mountain Dew (UK) 2013–2017 A citrus-flavored energy drink variant released under the 'AMP' brand in the U.K. in August 2013 by PepsiCo. Rather than being an entirely separate brand as is the case with its North American counterpart — the U.K. version of AMP Energy was released under the 'Mountain Dew' brand. It ...
Chemical element, symbol I and atomic number 53 Iodine, 53 I Iodine Pronunciation / ˈ aɪ ə d aɪ n, - d ɪ n, - d iː n / (EYE -ə-dyne, -din, -deen) Appearance lustrous metallic gray solid, black/violet liquid, violet gas Standard atomic weight A r °(I) 126.904 47 ± 0.000 03 126.90 ± 0.01 (abridged) Iodine in the periodic table Hydrogen Helium Lithium Beryllium Boron Carbon ...
Purple poppy. A purple poppy, on which the symbol is based. The purple poppy is a symbol of remembrance in the United Kingdom for animals that served during wartime. [1] The symbol was created in 2006 based on the principle of the traditional red remembrance poppy for Remembrance Day. [1]
Ozone ( / ˈoʊzoʊn /) (or trioxygen) is an inorganic molecule with the chemical formula O3. It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope O, breaking down in the lower atmosphere to O ( dioxygen ).
An air quality index ( AQI) is an indicator developed by government agencies [1] to communicate to the public how polluted the air currently is or how polluted it is forecast to become. [2] [3] As air pollution levels rise, so does the AQI, along with the associated public health risk. Children, the elderly and individuals with respiratory or ...
Soda lime canister used in anaesthetic machines to act as a carbon dioxide scrubber. Soda lime, a mixture of sodium hydroxide (NaOH) and calcium oxide (CaO), is used in granular form within recirculating breathing environments like general anesthesia and its breathing circuit, submarines, rebreathers, and hyperbaric chambers and underwater ...