The sun can heat the earth. What is the important content of observing and recording the weather?

Here refers to: temperature. That is, the sun can warm the earth, and temperature is an important part of observing and recording the weather. Whether the weather is cold or hot, everyone's feelings are often different. You can observe, measure and record with a thermometer. For example, the commonly used mercury thermometer, small temperature changes can lead to significant changes in the length of mercury column, with high accuracy.

Temperature characteristics:

According to an observable phenomenon (such as the expansion of mercury column), the degree of heat and cold is measured by one of several arbitrary scales. Temperature is the expression of translational kinetic energy between molecules in an object. The faster the molecule moves, that is, the higher the temperature, the hotter the object; The slower the molecule moves, that is, the lower the temperature, the colder the object. From the point of view of molecular motion theory, temperature is the symbol of the average kinetic energy of an object's molecular motion, and temperature is the collective expression of molecular thermal motion, which has statistical significance.