Advertisements
Advertisements
Question
Give reasons for the following
Extrusive rocks generally have small crystals.
Advertisements
Solution
Extrusive rocks generally have small crystals because in the formation of these rocks, the solidification of magma takes place at a slower rate.
RELATED QUESTIONS
Why is diamond clear and hard while graphite is soft?
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Classify the following rocks by selecting the correct option given below:
gypsum
Classify the igneous rocks on the basis of their place of origin.
How are chemically-formed sedimentary rocks produced?
Classify the following rock: Quartzite
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
Give one word for the following.
A sedimentary rock, which is composed of microscopically fine, soft and smooth particles.
Give one example of an area of: Sedimentary rocks in India
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Find the difference between:
Igneous and sedimentary rocks
How are igneous rocks formed?
What are fossils?
______ into slate caused by thermal metamorphism.
Parent Rock is converted to loose Rock by ______.
What are the uses of soil?
The oldest sedimentary rocks of the world have been identified in ______.
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 |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
