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Q: Which classification system is commonly used to categorize rocks based on their mode of origin?
  • A. Granite, limestone, sandstone
  • B. Igneous, sedimentary, metamorphic
  • C. Quartz, feldspar, mica
  • D. Intrusive, extrusive, clastic
Correct Answer: Option B - Classification of rocks– Based on geological formation– 1. Igneous rocks also known a primary, unstratified or eruptive rock are of volcanic origin and are formed as a result of solidification of molten mass lying below of above the earth's surface. • Sedimentary rocks are also known as aqueous or stratified rocks. • Metamorphic rocks are formed from igneous or sedimentary rocks as a result of the action of the earth movements, temperature changes, liquid pressure etc.
B. Classification of rocks– Based on geological formation– 1. Igneous rocks also known a primary, unstratified or eruptive rock are of volcanic origin and are formed as a result of solidification of molten mass lying below of above the earth's surface. • Sedimentary rocks are also known as aqueous or stratified rocks. • Metamorphic rocks are formed from igneous or sedimentary rocks as a result of the action of the earth movements, temperature changes, liquid pressure etc.

Explanations:

Classification of rocks– Based on geological formation– 1. Igneous rocks also known a primary, unstratified or eruptive rock are of volcanic origin and are formed as a result of solidification of molten mass lying below of above the earth's surface. • Sedimentary rocks are also known as aqueous or stratified rocks. • Metamorphic rocks are formed from igneous or sedimentary rocks as a result of the action of the earth movements, temperature changes, liquid pressure etc.