The ground stays warmer. so the top is frozen first because it comes in direct contact with the cold air, and the bottom is in closer contact to the warmer earth.
First the water must be in a cold place. Then, it freezes and turns into ice. And ice is a solid!!!
Yes, they come out in the rain. when the water rises they sit along the bank.
Well water in the seas came from glaciers that melter over time....When the earth freezes it freezes the water into glacires which melt into water...but if your asking where it came from before the age of man then no one knows where it came from.
The top of the water will freeze first because it is in direct contact with the air, the bottom will always remain ice free because it is thermally protected against the cold under the ice sheet, (so the fish tell me...) this is why fish will lie at the bottom in cold snaps... if the air temperature is cold enough for a considerable length of time it will eventually freeze completely.
In theory water will freeze if left at 32 F. However, that's not necessarily so. Distilled water must get much colder before it freezes, because at higher temperatures water need particulate contaminates in it to seed the crystallization process. Water contaminated with substances such as salt require lower temperatures to freeze.
When water freezes, there is an increase in hydrogen bonds. As the temperature decreases, water molecules come closer together, forming a crystalline structure in which hydrogen bonds become more stable and stronger, leading to the solidification of water into ice.
The white stuff is actually the impurities frozen in the water. Pure water freezes clear. Simply, air inside the liquid water becomes visible as water freezes. As water freezes, the bonds between the water molecules strengthen, causing the ice to harden. Tiny natural air bubbles found in tap water begin to be pressed together by the crystalization of the freezing water. Just as tiny water specks in the sky form clouds, tiny air specks in ice makes it cloudy.
Salt water freezes before plain water because the presence of salt lowers the freezing point of the water. Cold water will freeze faster than hot water because the molecules in the cold water have less kinetic energy and are more likely to form solid ice structures.
Ice forms on a lake when the water temperature decreases and reaches its freezing point (0°C or 32°F). As the temperature drops, the water molecules slow down and come closer together, eventually forming a crystalline structure and turning into ice. Factors such as air temperature, wind, and water circulation can influence the rate at which ice builds on a lake.
No, ice does not undergo a chemical change when it freezes. Freezing is a physical change that causes water molecules to slow down and come closer together, forming a solid structure with the same chemical composition as liquid water.
When water cools, it loses heat energy and at 0°C it freezes into ice. The water molecules slow down and come closer together, creating a crystalline structure.
The air, when water vapor particles are cooled to solids.