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प्रश्न
What are minerals?
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उत्तर १
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.
उत्तर २
The compounds of metals which occur in the earth crust and are obtained by mining are called minerals. A mineral is either a single compound or a complex mixture of several compounds of the same or different metals.
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संबंधित प्रश्न
State the types of rocks for the formation of which the following process is involved.
Formation of large crystals, coarse texture and slow cooling and compaction.
State the types of rocks for the formation of which the following process is involved.
Accumulation takes place over long periods of time in seas, lakes and streams.
Classify the following rock: Dolomite
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
Give an example of a Plutonic rock.
Give reasons for the following
Rocks are of great economic significance.
Fill in the blank below:
______are intrusions of igneous rock that are vertical in shape
Kola sample title is located in ______.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
