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Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Water A Precious Resource, Class 7, Science. You can practice these practice quizzes as per your speed and improvise the topic.
Q.
Ground water between two layers of rocks is called
- a)Rain water
- b)Water table
- c)Aquifer
- d)Water level
Correct answer is 'C'. Can you explain this answer?
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Practice Quiz or MCQ (Multiple Choice Questions) with solutions are av...
If groundwater is between two confined layers, it is called confined aquifer. If groundwater is not confined by an upper confining layer, it is unconfined equifer. If, on the other hand, groundwater is confined by two confining units (such as upper confining layer and lower confining layer), it is called confined aquifer.
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Practice Quiz or MCQ (Multiple Choice Questions) with solutions are av...
Groundwater between two layers of rocks is called an aquifer.
Explanation:
**Aquifer Definition:**
An aquifer is a body of saturated rock or sediment through which water can easily move. It is a natural underground reservoir that stores and transmits groundwater.
**Groundwater:**
Groundwater refers to the water that is present beneath the Earth's surface within the pore spaces and fractures of rocks and soil. It is an essential source of freshwater for various purposes, including drinking water, irrigation, and industrial use.
**Layers of Rocks:**
The Earth's crust is composed of various layers of rocks, which can be categorized into different types based on their composition and characteristics. These layers can include sedimentary, igneous, and metamorphic rocks.
**Groundwater between Two Layers of Rocks:**
When groundwater fills the pore spaces or fractures between two layers of rocks, it forms an aquifer. The rocks above and below the aquifer act as confining layers, restricting the movement of water beyond the aquifer boundaries.
**Characteristics of an Aquifer:**
- Porosity: The ability of an aquifer to hold water depends on its porosity, which is the volume of open space within the rock or sediment. Rocks with high porosity, such as sandstone, have more space for water storage.
- Permeability: Permeability refers to the ability of an aquifer to transmit water. It depends on the interconnectedness of the pore spaces and the size of the particles. Highly permeable aquifers, like gravel or sand, allow water to flow more easily.
- Water Table: The upper surface of the saturated zone within an aquifer is called the water table. It represents the boundary between the saturated and unsaturated zones, where the rocks or soil above the water table are not fully saturated with water.
**Importance of Aquifers:**
Aquifers are crucial for providing a sustainable supply of groundwater. They serve as natural reservoirs that can be tapped into through wells for human consumption and irrigation purposes. Proper management and conservation of aquifers are essential to ensure a continuous supply of freshwater and prevent overexploitation or contamination.
Overall, groundwater between two layers of rocks is referred to as an aquifer, which is a vital source of freshwater stored within the Earth's crust.
Explanation:
**Aquifer Definition:**
An aquifer is a body of saturated rock or sediment through which water can easily move. It is a natural underground reservoir that stores and transmits groundwater.
**Groundwater:**
Groundwater refers to the water that is present beneath the Earth's surface within the pore spaces and fractures of rocks and soil. It is an essential source of freshwater for various purposes, including drinking water, irrigation, and industrial use.
**Layers of Rocks:**
The Earth's crust is composed of various layers of rocks, which can be categorized into different types based on their composition and characteristics. These layers can include sedimentary, igneous, and metamorphic rocks.
**Groundwater between Two Layers of Rocks:**
When groundwater fills the pore spaces or fractures between two layers of rocks, it forms an aquifer. The rocks above and below the aquifer act as confining layers, restricting the movement of water beyond the aquifer boundaries.
**Characteristics of an Aquifer:**
- Porosity: The ability of an aquifer to hold water depends on its porosity, which is the volume of open space within the rock or sediment. Rocks with high porosity, such as sandstone, have more space for water storage.
- Permeability: Permeability refers to the ability of an aquifer to transmit water. It depends on the interconnectedness of the pore spaces and the size of the particles. Highly permeable aquifers, like gravel or sand, allow water to flow more easily.
- Water Table: The upper surface of the saturated zone within an aquifer is called the water table. It represents the boundary between the saturated and unsaturated zones, where the rocks or soil above the water table are not fully saturated with water.
**Importance of Aquifers:**
Aquifers are crucial for providing a sustainable supply of groundwater. They serve as natural reservoirs that can be tapped into through wells for human consumption and irrigation purposes. Proper management and conservation of aquifers are essential to ensure a continuous supply of freshwater and prevent overexploitation or contamination.
Overall, groundwater between two layers of rocks is referred to as an aquifer, which is a vital source of freshwater stored within the Earth's crust.
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