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प्रश्न
How is sand that flows in a river formed? Collect some information about where the sand comes from.
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उत्तर
- The force of flowing streams is so great that they may destroy rocks and soil.
- The powerful stream currents erode rocks on higher ground, which are then swept away into the sea.
- Additionally, silt is carried down from the mountain top where the streams begin.
- The majority of the sand in the river is silt that the streams carry, together with weather material from inland rocks.
- Sand formation in a river is caused by erosion, which is the movement of rock and soil with the stream.
संबंधित प्रश्न
Give an example of intrusive igneous rock.
Why are the igneous rocks also called the primary rocks?
Mention any two characteristics of Sedimentary Rocks.
How are sedimentary rocks formed?
Sedimentary rocks are also called stratified rocks. Why?
What are metamorphic rocks?
Give one word for the following.
The upper part of lithosphere, which is rich in silica and aluminium.
Give one term for the following statement:
Sheet like body of igneous rock.
Give reasons for the following
Silicates are the most common rock forming minerals.
Find the difference between:
Igneous and sedimentary rocks
Kola sample title is located in ______.
The word ‘Igneous’ is derived from the ______ word.
Parent Rock is converted to loose Rock by ______.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
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.
| 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 |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
