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, which can occur in a vacuum.

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another, often converting kinetic energy into thermal energy.

Front

What is a closed system?

Back

A closed system is one in which no matter enters or leaves, but energy can be exchanged with the surroundings.

Front

What is an open system?

Back

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

Front

How does lubrication affect mechanical systems?

Back

Lubrication reduces friction, which decreases energy lost to heat and improves efficiency.

Front

Why is increasing friction problematic in mechanical systems?

Back

Increasing friction leads to more energy being lost as heat, which can reduce efficiency and increase wear.

Front

What happens to thermal energy when ice cream is scooped with a warm scoop?

Back

The thermal energy of the scoop increases while the thermal energy of the ice cream decreases.