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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
Fill in the blank
Sedimentary rocks are formed from _____________ accumulated over long periods.
Write True or False. Rewrite the false statement correctly :
Igneous and sedimentary rocks can change into metamorphic rocks.
What are minerals?
Classify the following rocks by selecting the correct option given below:
Gneiss
Give two examples of sedimentary rocks.
How are sedimentary rocks classified on the basis of their formation?
Differentiate between Rock and Mineral
Give one word for the following.
Igneous rocks, which contain a low percentage of silica.
How are sedimentary rocks classified?
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
______ is known as the primary rocks.
Distinguish between Metamorphic rock and sedimentary rock.
Rocks are classified into ______ types.
______ into slate caused by thermal metamorphism.
What are the uses of soil?
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 |
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
