ICSE Solutions for Class 9 Geography – Rocks ICSE Solutions for Class 9 Geography – Rocks Exercises I. Short Answer Questions Question 1. State two points of distinction between rocks and minerals. Answer: Rocks : Rocks contain minerals. Rocks are the aggregates of minerals and other rock material. Minerals : Minerals do not contain rocks. Mineral are the compounds of pure elements with a definite chemical Composition. Question 2. Name any three elements of the earth’s crust. Answer: These are silicon, aluminium, iron, magnesium, calcium, potassium, sodium and nickel. Question 3. Name three types of rocks. Answer: Three types of rocks are sedimentary, igneous and metamorphic rocks. Question 4. Why are the igneous rocks also called the primary rocks? Answer: The igneous rocks were the first to be formed. They form the basis of formation of other types of rocks. Thus, they are called primary rocks. Question 5. Give one difference b...
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