_________ is heavy and dark in colour.
Basic igneous rock
Acid igneous rock
Extrusive igneous rock
Intrusive igneous rock
Rocks are classified into ____________.
Two
Three
Four
Five
___________ are chiefly compsoed of granite and commonly form the core of mountain ranges.
Laccoliths
Sills
Batholiths
Dykes
__________ are generally lack in iron and magnesium.
Extrusive igneous rocks
Intrusive igneous rocks
Basic igneous rocks
Acid igneous rocks
___________ are light in weight.
___________ rocks are the first to be formed.
Metamorphic
Sedimentary
Igneous
None of these
____________ are aggregates of mineral elements.
Rocks
Mountains
Plains
__________ rocks are not crystalline.
__________ form cores of mountain ranges.
Necks
____________ have a silica content between 65 to 85 percent.
