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प्रश्न
Give reasons
Limestone is changed into marble.
थोडक्यात उत्तर
उत्तर
Limestone is changed into marble because igneous and sedimentary rocks change into metamorphic rocks under a great heat and pressure.
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Rocks and Minerals
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| A | B | ||
| (i) | Core | (a) | Earth’s surface |
| (ii) | Minerals | (b) | Used for roads and buildings |
| (iii) | Rocks | (c) | Made of silicon and alumina |
| (iv) | Clay | (d) | Has definite chemical composition |
| (v) | Sial | (e) | Innermost layer |
| (f) | Changes into slate | ||
| (g) | Process of transformation of the rock | ||
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