Lesson No. 34 - “Thermal Energy and Temperature”

Thermal Energy • is the average kinetic energy present in a system. • the difference in the thermal energy of an object implies how hot or cold the object may seem. • a hot object contains high amounts of thermal energy

• Heat • “When thermal energy is transferred to a cold object, the energy is now called heat. • is a thermal energy in transit.

Note:

Matters contains thermal energy and not heat.

Once thermal energy is finished transferring, heat ceases.

• Temperature • Measures the average amount of kinetic energy • It is the measure of the hotness or coldness of an object.

• Thermometer (thermal-meter) • It is used to measure temperature • The first thermometer was developed by Galileo Galilei in 1602.

The word thermal is Greek term for “heat”.

Three Common temperature scales used –

1. degree Fahrenheit (℉) – established by Dutch inventor, Daniel Fahrenheit (1686- 1710) 2. degree Celsius (°C) – named after Anders Celsius (1701-1744) 3. kelvin (K) – William Thompson, AKA Lord Kelvin used the theory (discovery of the relationship between volume and temperature of the gas) as basis for creating the concept of absolute temperature.