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प्रश्न
What do you mean by a rock cycle?
उत्तर
One type of rock changes to another type under certain conditions in a cyclic manner. This process of transformation of the rock from one to another is known as the rock cycle. Let’s understand it through example—Igneous rocks change into sedimentary rocks. When the igneous and sedimentary rocks are subjected to heat and pressure, they change into metamorphic rocks. The metamorphic rocks which are still under great heat and pressure meet down to form molten magma. This molten magma again can cool down and solidify into igneous rocks.
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संबंधित प्रश्न
How are extrusive and intrusive rocks formed?
What are metamorphic rocks?
Tick the correct answer
Gold, petroleum and coal are examples of
Tick the correct answer
Rocks which contain fossils are
Match the following
| A | B | ||
| (i) | Core | (a) | Earth’s surface |
| (ii) | Minerals | (b) | Used for roads and buildings |
| (iii) | Rocks | (c) | Made of silicon and alumina |
| (iv) | Clay | (d) | Has definite chemical composition |
| (v) | Sial | (e) | Innermost layer |
| (f) | Changes into slate | ||
| (g) | Process of transformation of the rock | ||
Give reasons
Limestone is changed into marble.
What happens when igneous and sedimentary rocks go under great heat and pressure?
What is the mineral most commonly used in the following object?
What is the mineral most commonly used in the following object?
What is the mineral most commonly used in the following object?
