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प्रश्न
Name the rocks which are most widespread on the earth.
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उत्तर
Sedimentary rocks are the most widespread on the earth. Sedimentary rocks cover about three-fourths of the Earth’s land surface. They form extensive layers over large areas due to the continuous deposition of sediments by water, wind, and ice.
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संबंधित प्रश्न
Why is diamond clear and hard while graphite is soft?
Write True or False. Rewrite the false statement correctly :
Basalt is an example of an intrusive igneous rock.
Write True or False. Rewrite the false statement correctly :
Igneous and sedimentary rocks can change into metamorphic rocks.
Classify the following rocks by selecting the correct option given below:
sandstone
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Degradation and aggradation
Name any two characteristics of Igneous Rocks.
Name the three stages of lithification of Sedimentary rocks.
State the types of rocks for the formation of which the following process is involved.
Decomposition of organic matter at different stages and over different periods of time.
Describe how igneous rocks are formed.
Classify the following rock: Dolomite
Give one word for the following.
Rocks formed by the cooling and solidification of molten rock from beneath the earth crust.
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
State the properties of metamorphic rocks.
Give one term for the following statement:
It has a definite chemical composition with its own chemical and physical properties.
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Rounded or sub-rounded fragments, usually water-born cobbles, pebble and gravel, cemented together by a matrix of calcium carbonate, silica, etc.
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Oldest Sedimentary rocks of the world has been identified in Green land.
What is lava?
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.
