"Before a predicted frost, orange trees are often sprayed with water in an attempt to keep the fruit from freezing. Explain how this could help."
123804
I think the water "absorbs" the cold before the fruit.  If they were dry, the cold air would freeze the water in the fruit, but with water on the outside, that water has to freeze first.
555050
Good question. I think if you move any plant anywhere at the time when it is fruiting it will die anyway. You should perhaps wait a few weeks until the fruiting part has passed and the tree has lost its leaves as it will stand a better chance of survival if relocated. \n\nI suppose the effect on its cycles will depend on the climate of the place that you move it to. Moving it when it is autumn/winter here will mean it is the spring/summer in the southern hemisphere. Perhaps it will just not flower/fruit for the first year and then it will re-calibrate itself according to the local temperature and weather conditions in time for next year. \n\nOr maybe the fruit and leaves will just grow upside down! Ha ha.
406334
a) a lower freezing point than pure water
70856
Potatoes like apples experience oxidization rapidly hence the rapid browning. Placing them in water slows down this process as they are less in contact with oxygen which triggers the process.
589207
Assumption is that you have a source of food that you can freeze.\n\nFreezing is a tough science, because of the water content in the food.  Water expands when the temperature drip to below 4 degree C.\n\nImplication, Within the Food, the cell that has water in them(Most does) the water expands, and damage the cell walls.  Thus when you eat the food, the food, is mushy, not firm.\n\nRead the History of Birdeyes Fish Finger, to learn how they solve the issue.
15519
You mean the dew point, right? That is the temperature at which the air will become saturated with water and dew will begin to form as the air cools. As air cools below the dew point you can get fog, frost, clouds, rain, or snow.
40564
I won't do your homework for you, but I will give you a few hints.\n\nThe first hint is that ddnight is talkin' smack. This has nothing to do with atmosoheric composition.\n\nThe second hint is that you should be looking very varefully at the relative effect of C4 and CAM utilisation on water LOSS. Underline the word 'loss".\n\n--------------------\n>>>CAM plants and C4's do better in higher temps than C3's.\n\nGenerally yes. But the question is why the plants died in that order. Begonia are tropical plants, so a temperature would not have killed it, and the pineapple is both tropical nad C4, sdo temperature effects can't be at play directly.\n\nOnly one plausible explanation remains.
98560
The answer to this problem lies in colligative properties.  The salt ice solution will have a lower freezing point because by adding the salt, the solution is going through freezing point depression, which means that the solute is spreading apart the molecules of the solvent, thus requiring a lower temperature to freeze.
272280
The conduction of water in the xylem vessels of plant that is movement of water from root to shoot. Several theories have been forwarded to explain this phenomenon but none were absolutely flawless. The principal theories propounded to explain ascent of sap are a. vital theory b. cohesion-tension theory c. root pressure theory d. CP theory (The compensating-pressure theory).\n\nInspite of researches more than hundred in this field, the phenomena is still unsolved.
488617
A form of muation a orange is known for could have made your body available.
83175
This is a wild ass guess, but maybe where it's too cold for dying plants to decompose.  Instead of mature soil, you get peat.
52975
Some plants are considered 'hardy', which means that they can resist a winter freeze very well.\nThe root of the plant can survive underground and bring the plant back to life in the spring.\n\nOther plants aren't so hardy, and if you don't cover them during a freeze to protect from the cold, the plant will freeze from root to tip and not be able to rejuevenate it.\n\nHope this helps.
362026
Salt... When applied to ice, the salt (NaCl) dissolves into the water creating a salt water mixture which has a lower freezing point than pure water.\n\n10% salt solution freezes at 20 F (-6 C)\n20% salt solution freezes at 2 F (-16 C)\n\nSalt becomes less effective at temperatures below 0F (-32 C).\n\nEnjoy!
541982
Moisture darlin. Just because they freeze (the molecules get closer together) doesn't mean that water molecules won't come off due to...well I forgot the name of it...but I'm pointing you in the right direction.
184891
I don't have a scientific answer for you, except to say that's just how it works. You could say it's the same reason that water expands when it freezes, as opposed to almost everything else which contracts.
309149
The common wood frog freezes solid every winter and then, come spring, defrosts and mates. \n\nFrogs that survive freezing excite our imagination with visions of immortality. Underlining this excitement is the unexpected: our experience tells us that freezing kills. We've all read news stories of people who have lost fingers or toes to extreme cold, or even their lives. Thus, a whole animal that can survive freezing comes as a shock. Yet during the past two decades we have also read or even experienced the successes of in vitro fertilization, which involves the routine storage of sperm and embryos in a frozen state at cryogenic temperatures (-40°F or lower). So why is the survival of a frozen frog at 26°F surprising? \n\nThoroughly confused? You should be. Freezing has a yin-yang effect on biological materials—it can both preserve and destroy tissue. This paradoxical nature has led to two different fields of science and medicine built around freezing: cryopreservation and cryosurgery.\n\nSurviving the deep freeze\nLife is a complex set of electrochemical reactions. The rate at which chemical reactions take place depends on temperature, and usually the lower the temperature the lower the rate. At absolute zero Kelvin (-460°F), the rate is zero. Therefore, lowering the temperature of biological materials such as cells, organs, or entire organisms to absolute zero causes life to stop indefinitely. If a person or his or her body parts could survive the excursion to absolute zero and back, scientists and physicians could theoretically use such freezing as a vehicle to transport that person or parts to any point in the future. \n\nBecause we humans are mostly water, however, any journey into the supercool is physically traumatic. At about 31°F, the water in our bodies begins to freeze. It starts at this temperature (rather than 32°F) because biological water is in the form of a solution, mainly of ions or charged atoms. The survival of any cells during freezing depends at minimum on the rate the temperature changes. For most organisms, even the slowest cooling results in an assault on their cells that is just too great.\n\nResulting cell damage is related to the dissolved substances or solutes in biological water, to the cell membrane properties, and to the fact that ice has a very tight crystallographic structure and cannot contain solutes. When biological materials freeze, the solution between cells usually freezes first. Solutes found in the original solution are ejected and concentrated in the unfrozen space between the ice crystals. Cells usually remain unfrozen though supercooled.\n\nIn order to balance out the resulting difference in potential energy between the inside and outside of the cell, water leaves the cell through the cell membrane. Inside the cell, this loss of water causes an increase in the ionic concentration and leads to chemical damage. Interestingly, ions, not ice crystals, trigger cell injury during freezing. Theoretically, an infinitely fast rate to absolute zero would eliminate this harm. This is not possible, of course, and at higher cooling rates the supercooling of water in cells causes ice to form within those cells, which also brings about damage.\n\nNatural antifreezes\nCells in freeze-tolerant wood frogs experience the same mechanism of freezing injury as any other creatures' cells. The frogs freeze very slowly to a temperature often several degrees below freezing. This should destroy the frog's cells, yet those cells and the frog as a whole survive. How? A primary mechanism is through the production of glucose and its incorporation in the frog's cell. By lowering the amount of water that leaves the cell during freezing, the glucose offers protection against the rise in ionic concentration and excessive cell shrinkage, thereby reducing chemical harm.\n\nWhile the wood frog spent millions of years perfecting the use of such chemicals, scientists in the field of cryobiology disco
291083
they stabilize dust, control erosion, entrap air polluting gases, conserving water and harboring wildlife. Climate control is obtained by moderating the effects of sun, wind, and rain. Radiant energy from the sun is absorbed or deflected by leaves on deciduous trees in the summer and is filtered by their branches in winter. We are cooler when we stand in the shade of trees and are not exposed to direct sunlight. In winter, we value the sun's radiant energy; Wind speed and direction can be affected by trees.\n\nThere are many and many more , hope i could cover the gist.