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प्रश्न
Why are the Igneous Rocks called Primary Rocks?
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उत्तर
It is believed that the earth was in a molten state in the beginning Igneous rocks were the first rocks to be formed due to cooling and solidification of molten matter. Hence these are called Primary Rocks.
संबंधित प्रश्न
What is crust?
Give two examples of sedimentary rocks.
Name the types Sedimentary rocks based on agents of formation.
Explain this term associated with rocks: Laccoliths and Batholiths
Classify the igneous rocks on the basis of their place of origin.
Differentiate between Rock and Mineral
In what type of rocks do you find fossils and why?
Sedimentary rocks are also called stratified rocks. Why?
Classify the following rock: Basalt
Fill in the blanks
Extrusive rocks are also known as ______ rocks.
How are sedimentary rocks classified?
Give one term for the following statement:
Sheet like body of igneous rock.
How is Plutonic rock formed?
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.
This is the storehouse of rocks.
Sedimentary rocks are called stratified rocks.
Explain Dynamic Metamorphism.
Match the following.
| Group A | Group B | ||
| 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 |
