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प्रश्न
How is sand that flows in a river formed? Collect some information about where the sand comes from.
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
Why is diamond clear and hard while graphite is soft?
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Differentiate between SIAL and SIMA.
Classify the following rocks by selecting the correct option given below:
granite
Distinguish between the following pair:
Degradation and aggradation
What is Geology?
Explain this term associated with rocks: Extrusive Igneous Rocks
State the types of rocks for the formation of which the following process is involved.
Accumulation takes place over long periods of time in seas, lakes and streams.
Describe how are igneous rocks formed? State their chief characteristics.
Name different types of sedimentary rocks.
Give some examples of metamorphic rocks formed from sedimentary and igneous rocks.
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
Give one word for the following.
The upper part of lithosphere, which is rich in silica and aluminium.
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Fill in the blanks
The interior layer is the core, which is made up mainly of iron and nickel, and is called ______.
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Explain the type of Igneous Rocks.
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.
