In physics, temperature is usually used to express the hot or cold degree of an object.

Liquid thermometers are made based on how hot or cold an object is

The temperature of a mixture of ice and water at standard atmospheric pressure is 0 degrees Celsius, and the temperature of boiling water is 100 degrees Celsius.

The pointer is based on the principle of a thermometer, which is the thermal expansion and contraction of a solid.

First, see clearly the measuring range, and secondly, see clearly the graduation value of the thermometer.

The process of changing from solid to liquid

The experimental device is from bottom to top. The reason why the water bath is heated is to facilitate the observation of sea waves and the melting process of paraffin.

The temperature of sea waves remains constant during melting, that is, sea waves are crystals

subtopic

The temperature at which a crystal melts is called the melting point, while amorphous crystals do not have a fixed melting temperature

The process of changing from liquid to solid

The freezing point of the same substance is the same as its melting point

The fixed temperature at which a liquid solidifies to form crystals is called the freezing point

The process of matter changing from liquid to gaseous state

The process of matter changing from gaseous to liquid state

exotherm of liquefaction

Frost, snow, ice flowers, rime, etc. are all phenomena of sublimation. Camphor tablets; frozen clothes in winter slowly dry out, which is a phenomenon of sublimation.