Thermal unitb 5

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in a substance.

Front

What is the principle of heat transfer?

Back

Heat transfer occurs from a warmer object to a cooler object until thermal equilibrium is reached.

Front

What are the three methods of heat transfer?

Back

Conduction, convection, and radiation.

Front

Define conduction.

Back

Conduction is the transfer of thermal energy through direct contact between materials.

Front

Define convection.

Back

Convection is the transfer of thermal energy in fluids (liquids and gases) through the movement of the fluid itself.

Front

Define radiation.

Back

Radiation is the transfer of thermal energy through electromagnetic waves without the need for a medium.

Front

What happens to the kinetic energy of particles when temperature increases?

Back

The kinetic energy of particles increases, causing them to move faster.

Front

What is a convection current?

Back

A convection current is a circular movement of fluid caused by the uneven heating of the fluid, resulting in the rise of warmer, less dense fluid and the sinking of cooler, denser fluid.

Front

What is the effect of temperature on the state of water?

Back

Increasing temperature can change water from solid (ice) to liquid (water) to gas (steam).

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature and no heat flows between them.