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प्रश्न
Name any three elements of the earth’s crust.
उत्तर
These are silicon, aluminium, iron, magnesium, calcium, potassium, sodium and nickel.
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संबंधित प्रश्न
Write True or False. Rewrite the false statement correctly :
Minerals are organic substances.
Classify the following rocks by selecting the correct option given below:
shale
What is the main characteristics of Basic Igneous Rocks?
Explain this term associated with rocks: Extrusive Igneous Rocks
Classify the igneous rocks on the basis of their place of origin.
In what type of rocks do you find fossils and why?
Classify the following rock: Clay
Classify the following rock: Peat
Give one word for the following.
The upper part of lithosphere, which is rich in silica and aluminium.
Give one word for the following.
Igneous rocks, which contain a high percentage of silica.
Give one word for the following.
The best example of chemically-formed sedimentary rock, which has been formed by the evaporation of water from solution containing minerals.
Why are Sedimentary rocks called the Secondary rocks?
Give one term for the following statement:
Formed by evaporation in saline lakes.
Why are the Igneous Rocks called Primary Rocks?
This is the storehouse of rocks.
Igneous Rocks are ______ rocks.
Why are crystalline rocks called so?
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.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
