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प्रश्न
How are rocks important to us?
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उत्तर
Rocks are very important to us because they provide useful materials like minerals, metals, and fuels such as coal and petroleum. They are used in building houses, roads, and monuments. Over time, rocks break down to form soil that supports plant growth. Some rocks also store groundwater, which we use for drinking and irrigation. Thus, rocks are essential for our daily life and for the environment.
संबंधित प्रश्न
Write True or False. Rewrite the false statement correctly :
Sedimentary rocks are formed by the cooling and solidification of molten rock called magma
State two points of distinction between rocks and minerals.
Name the rocks which are most widespread on the earth.
Which agents are responsible for deposition of sediments?
What is metamorphism?
What are the causes of metamorphism?
What are metamorphic rocks?
Classify the following rock: Slate
Give one word for the following.
Igneous rocks, which contain a low percentage of silica.
Give one word for the following.
A sedimentary rock, which is composed of microscopically fine, soft and smooth particles.
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.
How are sedimentary rocks classified?
Give one term for the following statement:
Igneous rocks of deep seated origin.
Give one term for the following statement:
Formed by evaporation in saline lakes.
Distinguish between Metamorphic rock and sedimentary rock.
Distinguish between:
Internal Processes and External processes.
Lava comes out from a volcano.
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 |
