HEAT    HEAT SOURCES    HEAT IS IMPORTATNT     TEMPERATURE       HEAT MOVES     HEAT WORKS

 

 

 

            Heat & Temperature

 

Temperature Tools

Heat and temperature are not the same same thing.

Heat:

When two objects with different temperatures are in contact, energy goes from the hotter object to the colder object. Heat is the amount of energy that transfers from the hotter object to the colder object.

Temperature:

Temperature is the measurement of the speed of molecules vibrating in a material. Higher temperatures mean the molecules are moving, vibrating, and rotating faster and with more energy.

 


Everything takes a different amount of heat to increase its temperature. It usually takes less heat to raise the temperature of a metal than for other materials, like water or air.

 

 

Temperature Tools

In the United States, temperature is measured in degrees Fahrenheit (F). In other countries which use the metric system, temperature is measured in degrees Celsius (C).

 

Outdoor Thermometer
The outdoor thermometer uses the expansion and contraction of a liquid to measure temperature. The liquid in the bulb (usually ethyl alcohol with colouring added) expands 9gets bigger) when it is warmed and is forced up the narrow glass tube. The more the liquid cools. It contracts (gets smaller) and drops in the glass tube.

 

Clinical Thermometer
Another thermometer is the clinical thermometer. a liquid to measure temperature but it must be sensitive to very small changes in temperature. it has to be able to measure temperatures only within a few degrees of normal body temperatures (98ºF).

 

Thermostat
A thermostat can be used to measure temperature in an appliance, such as a furnace, or in a room. It can also switch appliances on or off at a preset temperature.

 

Thermocouple

A thermocouple is a thermometer that electricity to measure instead of a liqued. A thermocouple contains two wires, each of a different metal, that are joined together at one end. The other ends of the wires are connected to a meter that measures electricity. By measuring the amount of electricity that flows through the meter, you can measure the temperature of the metal wires.