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प्रश्न
What are minerals?
उत्तर
Minerals are natural inorganic substances having a crystalline form with definite physical and chemical properties. The most common minerals in the earth’s crust are silica, quartz, feldspar, mica, calcite, dolomite, gypsum, etc. There are about 2,000 minerals in the earth’s crust and these combine differently to form various kinds of rocks.
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संबंधित प्रश्न
Distinguish between the following pair:
Degradation and aggradation
What is the main characteristics of Basic Igneous Rocks?
What is meant by a rock?
How are rocks important to us?
Classify the following rock: Shale
Classify the following rock: Loess
Chemical sedimentary rocks are found in the beds of reservoirs.
How are igneous rocks formed?
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
