Advertisements
Advertisements
प्रश्न
How are rocks important to us?
Advertisements
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
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
What are metamorphic rocks?
What processes are involved in the formation of Igneous Rocks?
State the chief characteristics of metamorphic rocks.
Differentiate between Rock and Mineral
Classify the following rock: Shale
Classify the following rock: Dolomite
Classify the following rock: Graphite
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 reasons for the following
Extrusive rocks generally have small crystals.
Give reasons for the following
Silicates are the most common rock forming minerals.
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
Distinguish between Metamorphic rock and sedimentary rock.
Match the following:
| (a) | Igneous | (i) | Magma |
| (b) | Sedimentary | (ii) | Transformation |
| (c) | Metamorphic | (iii) | Gypsum |
| (d) | Molten material | (iv) | Basalt |
| (e) | Rock Cycle | (v) | Marble |
Distinguish between:
Internal Processes and External processes.
| A | B | ||
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
