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प्रश्न
Give reasons for the following
Rocks are of great economic significance.
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उत्तर
Rocks are of great economic significance Some of the main benefits of rocks are as follows :
- After disintergration, they turn into valuable soils.
- They are the store-houses of a large number of minerals.
- They are the source of precious metals like gold, silver, platinum etc.
- They are source of fuel-minerals.
- They provide different types of stones.
संबंधित प्रश्न
Fill in the blank
Granite is an example of intrusive ________ rocks.
Write True or False. Rewrite the false statement correctly :
Minerals are organic substances.
Briefly define Mechanical Metamorphism.
Distinguish between the following:
Calcarious and Carbonacious rocks.
State the types of rocks for the formation of which the following process is involved.
Decomposition of organic matter at different stages and over different periods of time.
How are chemically-formed sedimentary rocks produced?
What is meant by the term ‘metamorphism’?
Classify the following rock: Coal
Classify the following rock: Loess
Fill in the blanks
The interior layer is the core, which is made up mainly of iron and nickel, and is called ______.
Give one example of an area of: Metamorphic rocks,
How are sedimentary rocks classified?
Give one term for the following statement:
It has a definite chemical composition with its own chemical and physical properties.
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
Chemical sedimentary rocks are found in the beds of reservoirs.
How are igneous rocks formed?
How are igneous rocks formed?
Igneous Rocks are ______ rocks.
______ into slate caused by thermal metamorphism.
Match the following:
| Group 'A' | Group 'B' | ||
| A. | Granite | 1. | Bedrock |
| B. | Soil layer | 2. | Plutonic rock |
| C. | Barren island | 3. | Strip farming |
| D. | Soil conservation | 4. | Active Volcano |
