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First, a pond is comparatively deep - a couple of meters at least in its middle. Earth's temperature at this depth (I mean not in the pond exactly, but elsewhere) is comparatively stable - at least in the regions of mid-to-north Eurasia - I believe some 5-12 grades Celsius throuhout a year. (This temperature stability is used in air conditioning applying freon compressing - in winter when air is much colder this temperature difference is used for home heating, in summer, when air temperature is much higher this difference is used for cooling). So, it may be said that at the bottom of the pond there may be 16 degrees while the air ifor a long time is 26.
By that the surface of the pond's water reflects more light of the sun than the surface of the earth does.
Other factor is that water keeps evaporating (despite the fact that it is colder than the air) because it is liquid. The pond evaporates some of the molecules of its water so long as the air is relatively dry - by that the water get slightly cooler than the air measured by a conventional thermomter.
Somebody has added that:
Water is also a very poor conductor of heat. (You can hold the bottom of a test tube of water with your fingers while the top of it is boiling over a Bunsen burner.) So the hot summer might warm the top layer of water, but the heat is not quickly transferred down to the bottom.
But the fact that tube keeps being tolerable to the hand holding it at the bottom is owing to the water keeping eavaporating, so cooling itself. If the tube were hermetically closed, the water in it unable to evaporate and cool itself down would at first created a very big preassure (suppose the tube is securely firm) then it would have conducted the untolerable heat to the bottom no slower than a metal bar would do. Water is not a poor conductor of heat - only at the sea-level atmospheric preassure it won't allow its heating up over 100 degrees C.
What else can I help you with?
Short Answer how does the water kept in an earthen pot matka become cool during summer?
Evaporative cooling.During the process of evaporation ,air takes in heat, thus cooling down the surrounding areas.In other words, particles of liquid absorb energy from the surroundings to regain the heat lost during evaporation,thereby cooling nearby objects.Same is the case with an earthen pot.
Is water still water after dropping Alka seltzer in it?
Yes, water remains water even after dropping Alka Seltzer in it. The Alka Seltzer will dissolve in water, releasing bubbles of carbon dioxide gas, but the composition of the water itself does not change.
Is a soda just opening a mixture?
Yes - even long after it is opened it remains a mixture. When first opened it is a mixture of water, sweetener, flavoring, and dissolved carbon dioxide. Even after being open long enough to let the carbonation escape, it still is a mixture of water, sweetener and flavoring.
Is water acidic after boiling it?
Boiling it makes no difference to its acidity.
Why the boiling point of water remains at 100 C even though heat is going on rising?
The boiling point is a physical property dependent only on pressure.
What is average summer weather in Denmark?
Denmark is always cool even in the summer!
Is the climate hot during the summer in the desert?
No necessarily. There are cold deserts where the temperature remains quite mild or even cold in the summer.
Which place in Saudi Arabia has a cool climate even in summer and why?
The only places that have a cool climate in Saudi Arabia are those with air conditioning. These places are cool for obvious reasons. The rest of the country is sweltering desert in the summer.
How does nearness to a large body of water affect coastal city's temperatures in summer and winter?
Places near the sea are warmer in the summer and colder in the winter because water does not lose heat very fast in summer even after the sunset and in winter water is always frozen so any breeze going over the sea will keep the sea cool
Do platypuses prefer warm or cold water?
Platypuses prefer cool water. Ideally, they prefer temperatures around 18 degrees Celsius. Even in the tropical north, water temperature is reasonably constant and remains below 24-26 degrees Celsius, which is the maximum temperature in which platypuses can live comfortably.
What cool gifts are good for cool guys in the summer?
This website is good, http://www.gifts.com/ideas/him you can search by personality of the guy, search by price, and occasion. They even have personalized gifts as well.
When is it hot and cold in the desert?
In most deserts, it is hot in the summer and cool, or even cold, in the winter. It all depends on the particular desert.
How does high specific heat of large bodies of water benefit life?
A large body of water takes longer to warm up (in Summer) and to cool down (in Winter). Therefore the range of extreme temperature fluctuation tends to even out to an average over the four seasons.
Why does water at depth in lakes stay cold even on summer days?
it takes more
Why does water at depth stay cold even in hot summer days?
it takes more
What happens to water after people wash their hands in space?
The water remains as such after people wash their hands. Even on earth, the water is stored somewhere after washing.
Why does the water in the pressure cooker boils even if the flame is put off?
The temperature remains high for a while.
