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प्रश्न
State two characteristics of Basic Igneous Rocks.
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उत्तर
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Higher Percentage of Oxides: They have a higher percentage of iron and magnesium oxides, giving them a dark colour.
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Low Silica Content: They contain less silica compared to acidic rocks, making their magma more fluid.
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संबंधित प्रश्न
Give an example of intrusive igneous rock.
Name any three elements of the earth’s crust.
Give one difference between Extrusive igneous and Intrusive igneous rocks.
What are metamorphic rocks?
Give some examples of metamorphic rocks formed from sedimentary and igneous rocks.
Classify the following rock: Clay
Classify the following rock: Limestone
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
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:
It has a definite chemical composition with its own chemical and physical properties.
Give one term for the following statement:
Sheet like body of igneous rock.
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
How are igneous rocks formed?
What are metamorphic rocks?
The word ‘Igneous’ is derived from the ______ word.
An aggregate of minerals on the Earth’s Crust is called ______.
Rocks are classified into ______ types.
Lava comes out from a volcano.
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.
