Colder temperatures make molecules move more slowly. Since molecules are moving more slowly, they are less likely to 'bump' into each other and interact. When you are trying to dissolve a substance, you want as many interactions as possible between the substance you want to dissolve and the liquid you are trying to dissolve it in. Since the cold temperature slows down the rate of these interactions, it slows down the rate at which a substance dissolves.
Cold water simply slows down the rate at which salt dissolves.
The word "solution" implies that there is a solvent and a solute involved, which simply means they are mixed together. Whether or not the solute actually dissolves -- that is, decomposes into different chemical compounds from the original -- depends on the substance and the solvent being used. Usually a solution will be aqueous (liquid) in nature, but strictly speaking doesn't have to be liquid. It is true that temperature can affect solubility of various substances. Sugar, for example, dissolves more readily in hot tea than in cold tea. But the solubility of a substance at a given temperature depends on the substance itself. This sort of question is answered by chemistry, and there are various rules for determining how soluble a substance is. You can look up "solubility rules" for more detailed information on this.
Yes, when the temperature increases, the molecules in a substance gain more kinetic energy, causing them to move faster and vibrate more. This increased motion results in the substance expanding or changing phase (e.g. from solid to liquid or liquid to gas).
A cold liquid dissolves gas quicker than a hot liquid because colder temperatures slow down the motion of gas molecules, making them easier to dissolve in the liquid. Additionally, cold liquids can hold more dissolved gas compared to hot liquids.
evaporation is when liquid gets hot and turns into steam condensation is wen liquid gets cold and turns into a fog like substance
Powdered juice dissolves faster in hot water, but tastes better in cold water.
Salt dissolves quicker!
Yes, temperature can affect the solidity of a substance. When temperature increases, most solids will expand and become less solid, potentially melting into a liquid state. Conversely, when temperature decreases, solids tend to contract and become more rigid.
I can dissolve more sugar in hot tea rather than cold tea.
Traditionally, rockets use cryogenic (super-cold) oxygen and hydrogen.
coffee
Molten jelly is a liquid which sets to jelly when in contact with a cold surface.