A Dictionary of Science, Fifth Edition - download pdf or read online

By John Daintith

ISBN-10: 0192806416

ISBN-13: 9780192806413

This best-selling dictionary comprises over 9,000 entries on all elements of technology and gives accomplished assurance of biology (including human biology), chemistry, physics, the earth sciences, and astronomy. Appendices disguise the periodic desk, geological time scale, and animal and plant category. New positive factors contain digital thumb tags for simple reference, elevated parts together with astronomy and earth technological know-how and extra positive aspects on key issues akin to the sun process and Genetically converted Organisms. additionally featured are brief biographies of best scientists and chronologies of particular matters, together with plastics, electronics and telephone biology. either concise and wide-ranging, this dictionary is a perfect convenient reference paintings and nice creation for college kids and non-scientists alike.

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Its lightness, strength (when alloyed), corrosion resistance, and electrical conductivity (62% of that of copper) make it suitable for a variety of uses, including vehicle and aircraft construction, building (window and door frames), and overhead power cables. 1% by weight) it was not isolated until 1825 by H. C. Oersted (1777–1851). aluminium acetate See aluminium ethanoate. aluminium chloride A whitish solid, AlCl3, which fumes in moist air and reacts violently with water (to give hydrogen chloride).

Altruism Behaviour by an animal that decreases its chances of survival or reproduction while increasing those of another member of the same species. For example, a lapwing puts itself at risk by luring a predator away from the nest through feigning injury, but by so doing saves its offspring. Altruism in its biological sense does not imply any conscious benevolence on the part of the performer. Altruism can evolve through *kin selection, if the recipients of altruistic acts tend on average to be more closely related to the altruist than the population as a whole.

Amphiprotic See amphoteric; solvent. ampholyte A substance that can act as either an acid, in the presence of a strong base, or a base, when in the presence of a strong acid. ampholyte ion See zwitterion. amphoteric Describing a compound that can act as both an acid and a base (in the traditional sense of the term). For instance, aluminium hydroxide is amphoteric: as a base Al(OH)3 it reacts with acids to form aluminium salts; as an acid H3AlO3 it reacts with alkalis to give *aluminates. Oxides of metals are typically basic and oxides of nonmetals tend to be a amplifier a acidic.

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A Dictionary of Science, Fifth Edition by John Daintith


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