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प्रश्न
Find the difference between:
Igneous and sedimentary rocks
Give three points of difference between the igneous rocks and the sedimentary rocks.
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उत्तर
| Igneous Rocks | Sedimentary Rocks |
| These are formed due to the cooling and solidification of ‘magma’ and ‘lava’. | These rocks are formed due to continuous deposition and compaction of weathered pieces of rocks transported to various places by wind, glaciers, rivers, etc. |
| These are hard, homogeneous and heavy rocks. | These are brittle, layered and light in weight. |
| They lack fossils. | They show the presence of fossils. |
| Example: Basalt, Granite, etc. | Example: Sandstone, limestone, etc. |
Notes
Students should refer to the answer according to their questions.
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संबंधित प्रश्न
Why is coal hard and chunky?
Rocks and minerals play a very important role in our lives.
Can you imagine modern life without minerals?
State two characteristics of the mantle.
Classify the following rocks by selecting the correct option given below:
shale
Classify the following rocks by selecting the correct option given below:
marble
Classify the following rocks by selecting the correct option given below:
sandstone
What is Geology?
Name the types Sedimentary rocks based on agents of formation.
Give two examples of metamorphic rocks.
Explain this term associated with rocks: Extrusive Igneous Rocks
Explain this term associated with rocks: Lithification of Rocks.
State the types of rocks for the formation of which the following process is involved.
Decomposition of organic matter at different stages and over different periods of time.
Differentiate between Rock and Mineral
Name different types of sedimentary rocks.
Sedimentary rocks are also called stratified rocks. Why?
Classify the following rock: Limestone
Classify the following rock: Gypsum
Classify the following rock: Quartzite
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Give one word for the following.
Igneous rocks, which contain a low 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.
Fill in the blanks
______ rocks are formed by the deposition of shells and skeletons of organism.
Give one term for the following statement:
Rounded or sub-rounded fragments, usually water-born cobbles, pebble and gravel, cemented together by a matrix of calcium carbonate, silica, etc.
Give one term for the following statement:
Formed by evaporation in saline lakes.
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Why are the Igneous Rocks called Primary Rocks?
Give reasons for the following
Silicates are the most common rock forming minerals.
Give reasons for the following
Rocks are of great economic significance.
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
How is sand that flows in a river formed? Collect some information about where the sand comes from.
Classify and explain the rocks.
How are igneous rocks formed?
______ into slate caused by thermal metamorphism.
Lava comes out from a volcano.
What is lava?
Match the following.
| A. | Granite | 1. | Bed rock |
| 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 |
