Crystallisation take place by
A. Deposition from solution
B. Slow cooling
C. Direct change from vapour to solid
D. None
Answer: Option A
A. Deposition from solution
B. Slow cooling
C. Direct change from vapour to solid
D. None
Answer: Option A
On the basis of which content the igneous rocks are classified as acid rocks and basic rocks?
A. Magnetite
B. Hematite
C. Bauxite
D. Silica
Origin of Solar System divided in two groups, which are
A. Evolutionary and catastrophic
B. Nebula and gaseous tidal hypo
C. Jeansand Jeffires
D. A and B both
A. Attrition
B. Deflation
C. Denudation
D. Mantle
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