Thermal Energy

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 the independent variable in an experiment?

Back

The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of thermal energy 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 thermal energy through electromagnetic waves, which can occur in a vacuum.

Front

How does the thickness of a draft excluder affect energy transfer?

Back

A thicker draft excluder reduces energy transfer by providing better insulation, keeping warm air inside and cold air outside.

Front

What happens to water molecules as temperature increases?

Back

As the temperature of water increases, the energy of the water molecules increases, causing them to move faster.

Front

What is the relationship between temperature and kinetic energy?

Back

The higher the temperature of a substance, the greater the average kinetic energy of its particles.

Front

What is the purpose of a draft excluder?

Back

A draft excluder is used to prevent warm air from escaping a room and cold air from entering, improving energy efficiency.

Front

What is the effect of temperature on the speed of molecules in a liquid?

Back

In a liquid, as temperature increases, the speed of the molecules also increases.