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प्रश्न
Differentiate between SIAL and SIMA.
Mention three points of difference between SIAL and SIMA.
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उत्तर
| Sr. No. | SIAL | SIMA |
| 1. | The uppermost part of the earth’s crust is this one. | This is below the sial layer. |
| 2. | Its thickness is nearly 20 km. | Its average thickness is about 25 to 30 km. |
| 3. | It is composed of silica (Si) and aluminium (Al). | It is composed of silica (Si) and magnesium (mg). |
| 4. | It is not a continuous layer. It is not found on the ocean basin. | It is a continuous layer. |
| 5. | It is less dense. | It is more dense. |
| 6. | It is a granite layer. | It is a basaltic layer. |
Notes
Students should refer to the answer according to their questions.
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| C. | Coal | 3. | Metamorphic rock |
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Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
