Question:
In summer, in lakes upper warm water is separated from bottom cool water by mid water is called
In summer, in lakes upper warm water is separated from bottom cool water by mid water is called
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Epilimnion = upper warm lake layer, Thermocline = middle transition layer.
Updated On: Jul 18, 2026
- Thermocline
- Thermodynamics
- Thermal stratification
- Epilimnion
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The Correct Option is D
Solution and Explanation
Step 1: Understanding lake stratification.
In summer, lakes show thermal layering due to heating of surface water. This leads to formation of distinct temperature-based zones in the water body.
Step 2: Formation of upper warm layer.
The upper layer of lake water becomes warm due to direct exposure to sunlight. This layer is generally less dense and remains on top.
Step 3: Middle separating layer.
Between warm upper and cold bottom water, a transitional zone is formed. This layer shows rapid change in temperature with depth.
Step 4: Role of thermocline.
The thermocline is the zone where temperature decreases sharply with depth. It acts as a barrier between upper and lower water layers.
Step 5: Identification of epilimnion.
Epilimnion is the upper warm, well-mixed layer of lake water. It is directly influenced by wind and solar heating.
Step 6: Final conclusion.
Thus, the upper warm layer in summer lakes is called epilimnion.
In summer, lakes show thermal layering due to heating of surface water. This leads to formation of distinct temperature-based zones in the water body.
Step 2: Formation of upper warm layer.
The upper layer of lake water becomes warm due to direct exposure to sunlight. This layer is generally less dense and remains on top.
Step 3: Middle separating layer.
Between warm upper and cold bottom water, a transitional zone is formed. This layer shows rapid change in temperature with depth.
Step 4: Role of thermocline.
The thermocline is the zone where temperature decreases sharply with depth. It acts as a barrier between upper and lower water layers.
Step 5: Identification of epilimnion.
Epilimnion is the upper warm, well-mixed layer of lake water. It is directly influenced by wind and solar heating.
Step 6: Final conclusion.
Thus, the upper warm layer in summer lakes is called epilimnion.
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