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प्रश्न
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
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उत्तर
SIMA
संबंधित प्रश्न
Write True or False. Rewrite the false statement correctly :
Minerals are organic substances.
How are rocks different from minerals?
How do acidic igneous rocks differ from basic igneous rocks?
With the help of your teacher, collect different types of rocks such as granite, sandstone, limestone, marble, slate, graphite, etc. and prepare a chart containing information about their colour, hardness, texture, and permeability.
State two characteristics of Basic Igneous Rocks.
Explain this term associated with rocks: Lithification of Rocks.
Distinguish between Thermal metamorphism and Dynamic metamorphism.
State the properties of metamorphic rocks.
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.
Why are the Igneous Rocks called Primary Rocks?
How is sand that flows in a river formed? Collect some information about where the sand comes from.
Diamond is an example of _______ rock.
Which Soils are formed by the weathering of metamorphic rocks?
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
______ are chemical substances which exist in nature.
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 |
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
