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Este estímulo PISA presenta un texto explicando el efecto invernadero y dos gráficos que representan las emisiones de CO2 desde el año 1.860 al 1.990 y la temperatura media de la atmósfera a lo largo ...
TAREA PRINCIPAL: Los/las alumnos/as realizarán propuestas que posibiliten la mejora de la calidad del aire que respiramos. Para que eso se convierta en realidad, es indispensable que se reduzcan las e ...
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The citric acid cycle ? also known as the tricarboxylic acid cycle (TCA cycle), or the Krebs cycle, ? is a series of chemical reactions used by all aerobic organisms to generate energy through the oxi ...
Definition
Beer is an alcoholic beverage produced by the saccharification of starch and fermentation of the resulting sugar. The starch and saccharification enzymes are often derived from malted cereal grains, m ...
Definition
In analytical chemistry, ashing is the process of mineralization for preconcentration of trace substances prior to chemical analysis. Ash is the name given to all non-aqueous residue that remains afte ...
Definition
Effervescence is the escape of gas from an aqueous solution and the foaming or fizzing that results from a release of the gas. The word effervescence is derived from the Latin verb fervere (to boil), ...
Definition
A bog is a mire that accumulates peat, a deposit of dead plant material—often mosses, and in a majority of cases, Sphagnum moss. It is one of the four main types of wetlands. Other names for bogs incl ...
Definition
In chemistry, acid value (or "neutralization number" or "acid number" or "acidity") is the mass of potassium hydroxide (KOH) in milligrams that is required to neutralize ...
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Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions. It can have harmful effects on plants, aquatic animals, and ...
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