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प्रश्न
Distinguish between Regional and Contact metamorphism.
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उत्तर
Regional metamorphism When metamorphism of bed rocks takes place over a very large area, it is called Regional metamorphism. It is usually caused by the movement of the earth’s crust. Contact metamorphism when it takes place over a small area, it is called Local Metamorphism or Contact Metamorphism. It commonly occurs when hot magma comes in contact with other rocks.
संबंधित प्रश्न
Fill in the blank
Sedimentary rocks are formed from _____________ accumulated over long periods.
With the help of your teacher, collect different types of rocks such as granite, sandstone, limestone, marble, slate, graphite, etc. and prepare a chart containing information about their colour, hardness, texture, and permeability.
What processes are involved in the formation of Igneous Rocks?
What is meant by a rock?
Sedimentary rocks are also called stratified rocks. Why?
Distinguish between Thermal metamorphism and Dynamic metamorphism.
Classify the following rock: Loess
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Why fossils are preserved in Sedimentary and not in Igneous rocks?
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
Lava comes out from a volcano.
The word Ignis means rock.
______ rocks are also called Primary rocks.
Minerals exist in nature ¡n the form of ______ or ______.
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 |
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 |
