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प्रश्न
State two characteristics of the mantle.
State two chief characteristics of the mantle.
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उत्तर
- The mantle is semi-solid.
- It is rich in iron and magnesium.
- This layer is about 2,850 km wide. Its average density is between 3.5 and 5.5.
संबंधित प्रश्न
What are metamorphic rocks?
Give two examples of sedimentary rocks.
Explain this term associated with rocks: Extrusive Igneous Rocks
Explain this term associated with rocks: Laccoliths and Batholiths
Distinguish between the following:
Plutonic and Volcanic 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 igneous rocks are formed.
Classify the igneous rocks on the basis of their place of origin.
Sedimentary rocks are also called stratified rocks. Why?
Classify the following rock: Coal
Classify the following rock: Granite
Classify the following rock: Quartzite
Classify the following rock: Slate
Classify the following rock: Graphite
Give one word for the following.
The outer layer of the earth.
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
Give one example of an area of: Metamorphic rocks,
Why are Sedimentary rocks called the Secondary rocks?
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Which one of the following is the most widespread most and productive category of soil.
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.
An aggregate of minerals on the Earth’s Crust is called ______.
______ into slate caused by thermal metamorphism.
Explain about Petrology.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
Explain Dynamic Metamorphism.
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.
