Thermal Energy - 8th

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 method of heat transfer through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the method of heat transfer that occurs in fluids (liquids and gases) through the movement of the fluid itself.

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 happens to ice cubes in a warm room?

Back

Ice cubes absorb heat from the warm room, causing them to melt.

Front

How does heat transfer occur between a hot object and a cold object?

Back

Heat always transfers from the hot object to the cold object until thermal equilibrium is reached.

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.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

If a bus travels 500 meters in 1 minute, how far does it travel in 5 minutes?

Back

The bus travels 2500 meters in 5 minutes.

Front

What is the average speed of a student who runs 180 meters in 30 seconds?

Back

Average speed = 180 meters / 30 seconds = 6 m/s.