0
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.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoIt remains cool because water evaporates form the surface of the pond, taking heat energy out of the pond water as it does so. Try this - lick your finger then hold it up and blow on it gently. You will feel the wet finger cool in the wind. This is what is happening to the pond - it is cooled by what is called the "latent heat" of evaporation.
Wiki User
∙ 7y agoHeat rises to the surface, and cooler water sinks to the bottom of the pond.
Wiki User
∙ 13y agoEvaporation cools it.
Add your answer:
Earn +20 pts
Are there conditions when pure water can loose its transparency?
No there is no such condition when water looses its transparency. Water is present in all three states of matter i.e. liquid, solid and gas but in three of these states it remains transparent.Therefore, even if the temperature changes,resulting in ice or water vapor ,it remains transparent.
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.
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 the temperature of a desert during a sandstorm?
The temperature would depend upon the season of the year and cause of the storm. If the cause of a storm is a cold front, the temperature can be quite cool, even cold, in the winter. Sometimes summer thunderstorms can stir up a sandstorm even on hot days. There is no single answer to your question.
Briefly describe how soil is formed?
Soil is composed of weathered rocks that have been reduced to grains, added to by organic remains of plants, leaves, and grasses. Fertilised with animal remains and animal waste, to which water plays a large part to help decomposing organisms to reduce matter even further.
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.
Even when the Sun is shining on a body of water the water is still cool because of its high what?
specific heat
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.
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 water at depth stay cold even in hot summer days?
it takes more
Why does water at depth in lakes stay cold even on summer days?
it takes more
