Sunday, July 4, 2010

APPSC GENERAL SCIENCE

Distribution of elements on the surface of the earth

Element
Distribution

Element
Distribution





Oxygen
49.85%

Silicon
26.03%





Aluminium
7.28%

Calcium
3.18%





Sodium
2.33%

Potassium
2.23%





Magnesium
2.11%

Hydrogen
0.97%





Titanium
0.41%

Chlorine
0.20%





Carbon
0.19%

Others
1.00%

Metals and their ores

Substance
Ore

Substance
Ore





Calcium
Limestone, marble, chalk

Mercury
Cinnabar





Copper
Copper pyrites, Cuprite

Potassium
Carnelite, Saltpetre





Cement
Limestone and clay

Sodium
Rock salt, Cryolite





Glass
Silica and lime stone

Thorium
Monozite





Iodine
Sea weeds

Titanium
Rutile, limenite





Iron
Hematite, Magnatite, Iron pyrites

Uranium
Pitchblende





Gold
Aurite

Silver
Argentite

Metals and their alloys


Alloy
Component




Brass
Copper, Zinc




Bronze
Copper, Tin, Zinc




Gun metal
Copper, Tin, Zinc




Duralmin
Aluminium, Copper,
Magnesium, Manganese




Solder
Aluminium, Lead, Tin




Pewter
Lead, Tin

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