6.2 Thermal Energy (Lessons 1-4)

Front

What is thermal energy?

Back

Thermal energy is the total energy of all the particles in an object, which is related to its temperature.

Front

Why do some cups have double walls?

Back

Double walls help maintain the temperature of liquids inside the cup by providing insulation.

Front

What is the purpose of a lid on a cup?

Back

A lid slows down the loss of heat and matter from the cup, helping to keep the contents warm.

Front

What is a system in the context of thermal energy?

Back

A system includes all the parts that interact with each other, such as the cup, liquid, and air inside.

Front

What is conduction?

Back

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

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases).

Front

What is radiation?

Back

Radiation is the transfer of thermal energy through electromagnetic waves, such as heat from the sun.

Front

What happens to thermal energy when a substance is heated?

Back

When a substance is heated, its particles move faster, increasing its thermal energy and temperature.

Front

What is insulation?

Back

Insulation is a material that reduces the transfer of thermal energy, helping to maintain temperature.

Front

What is the role of air in a cup system?

Back

Air in the cup system can affect heat transfer, as it can act as an insulator.