Physical property of matter
water vapor
Heat is needed for matter to change form eg: Melting, condensation, etc.
I am pretty sure that it is the temperature which is applied to the substance. For example when heat is applied to a solid it melts, causing it to change from one phase to another. Also when a liquid freezes the temperature drops and it converts into a solid.
It is matter. because H2O means water, and water is one form of matter cause its liquid.
A change in temperature or pressure can often be a clue to the transformation of matter from one state to another. For example, melting ice into water is a change from solid to liquid state due to an increase in temperature.
A physical property.
At room temperature water is a liquid. You can observe (or measure) density, viscosity, thermal conductivity, electrical resistivity, refractive index etc.
One observes a physical property.
Yes, pure water is an example of homogeneous matter as long as it's one phase.
well... first of all.... water is not a mixture...... and if it is a mixture..... it would be homogenous..... becuase there is only one phase of matter seen....... :)
water vapor
It is not entirely correct to talk about "the" three phases. There are actually more than three phases of matter. In the case of water, the three "main" phases are called: "ice" (for solid water), "liquid water" or just "water" for the liquid phase, and "water vapor" for the gaseous phase. In the case of water, and many other substances, there is also a "supercritical" phase (among others). I don't think this one has a special name, in the case of water. The supercritical phase is used for dry cleaning; although it is more common to use carbon dioxide for this purpose, since it requires less temperature and pressure.
phase change.
This is called a change in phase or a phase transition. It occurs when a substance transitions from one of the states of matter (solid, liquid, gas) to another due to changes in temperature or pressure.
After dissolving salt and sugar in water, you primarily see one phase of matter: the liquid phase. The salt and sugar dissociate into ions and molecules, becoming part of the water solution, which appears homogeneous. Although the solid salt and sugar initially exist in separate phases before dissolving, once fully dissolved, the mixture behaves as a single liquid phase.
A phase transition.
Phase change. Liquid phase to gaseous phase (evaporation) Liquid phase to solid phase (solidification, freezing) Solid phase to gaseous phase (sublimation9 Etc...