martes, 25 de marzo de 2008

SILVER!!




Silver is chemical element with the symbol ag(argentum)
Silver is found in native form mixed with gold or sulfur.Silver is veri ductillity and malleable(harder than gold)it has the highest electrycal conduction of all metals.


USES
We use silver for making objects,construct houses,cars...
Jewellry and silverware are traditionally made from sterling silver(an alloy of 92.5%silver and 7.5%copper)

Silver can dissolves in mercury to make dental fillings.Silver can use for make coins.They used the metal in medicines(to show toxic effect in some bacterias,viruses...)

In food,in India,especially sweets we found with a layer of silver (for decorating)
In clothes,to evite grow bacterias an fungi in the clothes,It keeps odour to a minimum and reduces the risk of bacterial and fungi infection.
Silver is used in clothing in two main forms:
·A form in which silver
ions are integrated into the polymer from which yarns are made (a form of nanotechnology)
·A form in which the silver is physically coated onto the yarns.

lunes, 10 de marzo de 2008

Coming up test

Language test, thursday 13th of march.

martes, 4 de marzo de 2008

homework

Maths page 129: 22.
Language page 115: 1,2,3,4.

domingo, 2 de marzo de 2008

Homework

Language page 112: 1,2,3,4. page 113: 6,7,8.
Maths page 129: 14,15,16,17.
History page 117: 1,2. page 120: 1,2,3.