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प्रश्न
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
उत्तर
The composite zone inhabited by most living creatures is called biosphere. It includes a part of the atmosphere, the hydrosphere and a part of the lithosphere. All three layers are essential for life to exist.
As lithosphere is only a small part of the biosphere, therefore, man’s habitat is the biosphere and not the lithosphere in the true sense.
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संबंधित प्रश्न
Why are the igneous rocks also called the primary rocks?
Which rocks are associated with ores of metals?
Give two examples of metamorphic rocks
Distinguish between the following: Calcarious and Carbonacious rocks.
State the types of rocks for the formation of which the following process is involved.
Solidification of magma on the surface of the earth.
What is metamorphism?
What physical agents are involved in the sedimentary rocks?
How are chemically-formed sedimentary rocks formed? Give examples.
Give some examples of metamorphic rocks formed from sedimentary and igneous rocks.
Classify the following rock: Loess
Classify the following rock: Slate
Give one word for the following.
The upper part of lithosphere, which is rich in silica and aluminium.
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
Give one term for the following statement:
Type of metamorphism in which changes are caused due to high pressure.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
This is the storehouse of rocks.
______ into slate caused by thermal metamorphism.
______ are chemical substances which exist in nature.
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.
