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प्रश्न
Give reasons for the following
Extrusive rocks generally have small crystals.
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उत्तर
Extrusive rocks generally have small crystals because in the formation of these rocks, the solidification of magma takes place at a slower rate.
संबंधित प्रश्न
Classify the following rocks by selecting the correct option given below:
gypsum
Classify the following rocks by selecting the correct option given below:
basalt
Name two important landforms made by Igneous Rocks.
Which agents are responsible for deposition of sediments?
What is metamorphism?
Differentiate between Rock and Mineral
Classify the following rock: Gneiss
Fill in the blanks
The interior layer is the core, which is made up mainly of iron and nickel, and is called ______.
How are sedimentary rocks classified?
Give reasons for the following
Rocks are of great economic significance.
______ is the kind of metamorphic rock using which Taj Mahal was built.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Choose the incorrect statement from the following.
Classify and explain the rocks.
Rocks are classified into ______ types.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
Minerals exist in nature ¡n the form of ______ or ______.
What are the characteristics of Sedimentary rocks?
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 |
