Advertisements
Advertisements
प्रश्न
Differentiate between SIAL and SIMA.
Mention three points of difference between SIAL and SIMA.
Advertisements
उत्तर
| Sr. No. | SIAL | SIMA |
| 1. | The uppermost part of the earth’s crust is this one. | This is below the sial layer. |
| 2. | Its thickness is nearly 20 km. | Its average thickness is about 25 to 30 km. |
| 3. | It is composed of silica (Si) and aluminium (Al). | It is composed of silica (Si) and magnesium (mg). |
| 4. | It is not a continuous layer. It is not found on the ocean basin. | It is a continuous layer. |
| 5. | It is less dense. | It is more dense. |
| 6. | It is a granite layer. | It is a basaltic layer. |
Notes
Students should refer to the answer according to their questions.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
A category of rock which is formed by the alteration of the parent rock due to heat and pressure is called: ______________.
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Write True or False. Rewrite the false statement correctly :
Rocks are used in construction industries.
Classify the following rocks by selecting the correct option given below:
sandstone
Classify the following rocks by selecting the correct option given below:
schist
How are sedimentary rocks formed?
What are metamorphic rocks?
Which rocks are associated with ores of metals?
Distinguish between the following:
Plutonic and Volcanic rocks.
State the types of rocks for the formation of which the following process is involved.
Accumulation takes place over long periods of time in seas, lakes and streams.
Distinguish between rocks and minerals.
How are sedimentary and igneous rocks formed?
Classify the following rock: Clay
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
Give one word for the following.
Igneous rocks, which contain a high percentage of silica.
Give an example of a Plutonic rock.
Give reasons for the following
Rocks are of great economic significance.
Fill in the blank below:
______are intrusions of igneous rock that are vertical in shape
______ is known as the primary rocks.
How are igneous rocks formed?
Diamond is an example of _______ rock.
Igneous Rocks are ______ rocks.
Lava comes out from a volcano.
Explain Dynamic Metamorphism.
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.
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:
| Group 'A' | Group 'B' | ||
| A. | Granite | 1. | Bedrock |
| B. | Soil layer | 2. | Plutonic rock |
| C. | Barren island | 3. | Strip farming |
| D. | Soil conservation | 4. | Active Volcano |
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
