Advertisements
Advertisements
प्रश्न
Give reasons for the following
Rocks are of great economic significance.
Advertisements
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
Why is diamond clear and hard while graphite is soft?
Fill in the blank
Granite is an example of intrusive ________ rocks.
Fill in the blank
Conglomerate is an example of _____________ rocks.
Why are the igneous rocks also called the primary rocks?
Give one difference between Extrusive igneous and Intrusive igneous rocks.
Which agents are responsible for deposition of sediments?
Explain the formation of sedimentary rocks on the basis of agents of formation.
Sedimentary rocks are also called stratified rocks. Why?
What are metamorphic rocks?
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
Give one word for the following.
Rocks formed by the cooling and solidification of molten rock from beneath the earth crust.
Give one word for the following.
The best example of chemically-formed sedimentary rock, which has been formed by the evaporation of water from solution containing minerals.
Give one example of an area of: Metamorphic rocks,
Give one example of an area of: Sedimentary rocks in India
How are sedimentary rocks classified?
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Distinguish between Metamorphic rock and sedimentary rock.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
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:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
