Advertisements
Advertisements
Question
Distinguish between the following: Acid Igneous Rocks and Basic Igneous Rocks.
Solution
| Acid Igneous Rocks | Basic Igneous Rocks |
| These are lighter rocks with silica content 65 to 85 percent with density less than 2 g/Cm3 | These are denser rocks with silica content 40 to 60 percent with average density between 2.8 g/Cm3 and 3.0 g/Cm3 |
| e.g. Granite. | e.g. Basalt. |
APPEARS IN
RELATED QUESTIONS
Classify the following rocks by selecting the correct option given below:
sandstone
Explain the structure of the earth’s interior?
What is Geology?
Give one difference between Extrusive igneous and Intrusive igneous rocks.
Name the rocks which are most widespread on the earth.
Explain this term associated with rocks: Metamorphism
Classify the igneous rocks on the basis of their place of origin.
What is meant by a rock?
Classify the following rock: Clay
Give one word for the following.
Igneous rocks, which contain a low percentage of silica.
Give one example of an area of: Metamorphic rocks,
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Give reasons for the following
Extrusive rocks generally have small crystals.
Give reasons for the following
Silicates are the most common rock forming minerals.
Kola sample title is located in ______.
The word ‘Igneous’ is derived from the ______ word.
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.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
