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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
Discuss the importance of rocks for the construction business.
What is the difference between the inner and the outer core?
Give an example of intrusive igneous rock.
State two characteristics of Basic Igneous Rocks.
How are chemically-formed sedimentary rocks formed? Give examples.
Classify the following rock: Quartzite
Classify the following rock: Graphite
Fill in the blanks
Extrusive rocks are also known as ______ rocks.
Why are the Igneous Rocks called Primary Rocks?
Why fossils are preserved in Sedimentary and not in Igneous rocks?
Distinguish between Intrusive and Extrusive Rocks
Fossils are found in.
Choose the incorrect statement from the following.
Mention the types of rocks based on formation?
The types of rocks based on formation are
The two types of Intrusive Igneous rocks are ______.
______ rocks are also known as stratified rocks.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
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 |
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
