an introduction
The planet is the only planet that is distinguished from the rest of the planets with the existence of life on its surface, because it possesses all the factors that help to live organisms on it. The size of the average earth and its possession air cover protects it from harmful rays, and the presence of water on its surface made it the most suitable planet for the emergence of life on its surface, As well as the appropriate distance from the sun to make the temperature suitable for living organisms on them, the most important elements of life on the planet the appropriate temperature, it is not too cold to freeze objects, and is too hot to burn objects, and temperatures vary from one area to another on X H land there became trends to study the temperature differences between the region and another, what is the heat? What are the methods of measurement?
the heat
Heat is a form of energy, accompanied by the movement of atoms and molecules that make up matter. Heat, like other forms of energy, is generated from several sources, such as chemical reactions, nuclear reactions, electromagnetic radiation, and motion.
Temperature is a form of energy, while temperature is a measure of the amount of heat energy stored in a particular body. It also indicates how cold or how hot the body is. It is known that Thermal energy moves from the warmest object to the coldest object until the two bodies are equal in the amount of heat stored in each, which determines the direction of heat transfer in this form is the temperature.
Thermometers
There are several units measured by the temperature, namely:
- Calvin: Or as the absolute temperature is called.
- Centigrade or silicios.
- Fahrenheit.
Temperature measurement
Temperature can be measured in many ways, most notably:
Liquid Thermometer
Which is a transparent tube and a drawer, containing inside the liquid is either alcohol, called the balance of alcohol, or mercury called the balance of mercury, and there is this liquid in the bulb at the base of the tube, so if the temperature increases this liquid, This gives us a temperature measurement. If the temperature drops, the liquid will shrink back to the bulb, giving us another temperature measurement. The mercury balance is usually used more than the alcohol balance. The most common examples of these scales are the medical mercury thermometer for temperature measurement the body.
Electric Thermometer
It is a balance consisting of two wires between the electric resistance, so that this resistance changes the temperature of the two wires, and thus measures the temperature, and uses this balance significantly in cars and aircraft.