Information about the shape change of water.

When the temperature drops to 0℃, water becomes solid and exists in the form of ice. When the temperature rises to 100℃, water will evaporate and exist as gas.

It can be seen that the three forms of water are mutual and can change with the change of temperature.

Water in nature also appears in many forms due to different conditions and processes, such as "frost", "snow", "cloud" and "dew" in the table below.

Extended data:

Water molecules consist of one oxygen atom and two hydrogen atoms. However, the combination between these three atoms is asymmetric, which makes water molecules so special.

The two hydrogen atoms are arranged on both sides of the oxygen atom at an angle of 105 instead of 180. As a result of this arrangement, one end of the hydrogen atom has a little positive charge, while one end of the oxygen atom has a little negative charge.

Because opposite charges attract each other, water molecules will gather together: the negative oxygen end of one water molecule will be attracted by the positive hydrogen end of adjacent water molecules. The weak binding force between water molecules is called hydrogen bond.

When frozen, water molecules form a hexagonal structure under the action of hydrogen bonds. When the temperature rises, ice becomes water, water molecules move freely, and hydrogen bonds are sometimes formed and sometimes broken.

When the temperature rises further, the vibration speed of water molecules is accelerated, all hydrogen bonds are broken, water molecules are free, and liquid becomes steam.

Reference source: Baidu Encyclopedia-Water