Unit 4: Thermal Energy (I.6C & I.6D)

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance, which is related to its temperature.

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, and does not require a medium.

Front

What is a closed system?

Back

A closed system is a physical system that does not exchange matter with its surroundings, but can exchange energy.

Front

What is an open system?

Back

An open system is a system that can exchange both energy and matter with its surroundings.

Front

What is an insulator?

Back

An insulator is a material that does not conduct heat well, preventing heat transfer.

Front

What is a conductor?

Back

A conductor is a material that allows heat to pass through it easily, facilitating heat transfer.

Front

How does lubrication improve mechanical efficiency?

Back

Lubrication reduces energy lost to heat from friction, improving the efficiency of mechanical systems.

Front

What happens to molecules when an object is heated?

Back

When an object is heated, its molecules gain energy, speed up, and move further apart.