How does water change state?
When water is a solid (ice) the particles are moving very slowly (lets call this the 1st state) . As heat is added the particles move faster, until it reaches 1*C. Because 0*C is freezing point, 1*C is melting point (2nd state). This would be the liquid water. When the water is heated, the particles move even faster, causing it to turn into a gas (water vapor and this is the 3rd state). When heat is taken away the reverse happens. When you go into more depth you actually find that the word "heat" is replaced with "engergy". This is more accurate.
CHANGES OF STATE change of state (or change of phase) of a substance describes the change of a substance from a solid to a liquid, liquid to a vapor (or gas), vapor to a liquid, liquid to a solid, solid to vapor, or vapor to a solid. In meteorology you are concerned primarily with the change of state of water in the air. Water is present in the atmosphere in any or all of the…
What change of state is occurring when a cold glass of water collects water droplets on the outside on a hot summer day?
because during a water cycle only the state of the water molecules are changed i.e. first from liquid to vapour and then to solid (snow and hailstorm) or liquid (rain). since there is a change only in the physical state of water and there is no change in the chemical properties of the water molecule it is a physical change.
If water is being split into hydrogen and oxygen then a change of state (phase change) will occur if the water is in liquid form and the hydrogen and oxygen are evolved as gases. If water vapor is being split, then obviously no change of state occurs. Conversely, solid water in the form of ice could be split into hydrogen and oxygen gas, also undergoing a phase change.
Cloud forming rain are as a result of physical change. From the body of waters on land, water vaporizes (that is) changes to water vapor which is physical change. Water vapor at higher altitude condenses to form cloud which is still another physical change. The whole process is physical change of water molecules from liquid state to gaseous state and solid state in form of cloud.