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Gold can be alloyed with other metals such as copper, silver and zinc. TRUE OR FALSE.
TRUE
Gold is a _________.
 
precious metal
 
gas
Gold occurs in ___________ and in ______.
 
river deposits and rocks
 
volcanoes and earthquakes
Gold is found in many places but in very ___________.
 
small quantities
 
large quantities
________ is bright,slightly, reddish-yellow,soft, malleable and ductile.
 
gold
 
granite
________ is the raw material for making aluminium.
 
Bauxite
 
Copper
_______ is very light,soft,malleable and durable.
 
Aluminium
 
Halite
Pewter, an alloy is made by mixing tin with antimony, lead and bismuth. TRUE OR FALSE.
TRUE
_____ has became so important in modern world.
 
tin
 
quartz
copper is used in electrical,automobile and steel industry. TRUE OR FALSE.
TRUE
_______ is a soft brown metal found in igneous and metamorphic rocks.
 
copper
 
sulfur
Hematite content ______ iron.
 
70%
 
20%
_________ is also an important industrial ore.
 
Hematite
 
Topaz
_______ is the most useful mineral.
 
iron
 
galena
those which do not have metal content are called _______.
 
non-metallic minerals
 
metallic minerals
industry depends on about _____ of them.
 
80
 
1800
more than ______ minerals have been identified till yet
 
2,000
 
20
 
2,000,000
those minerals which contain metal are called ______.
 
metallic minerals
 
non-metallic minerals
minerals from which metals can be profitable extracted are called ______.
 
ores
 
luster
minerals are of two types ________ and __________
 
metallic and non-metallic
 
squishy and non-squishy
A _________ is a pure inorganic substances that occurs naturally in the earth's crust.
 
mineral
 
rock
_______ are valuable natural resource.
 
minerals
 
vitamins
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