Thermal energy and heat transfer

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of moving particles in a substance.

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What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light.

Front

What is temperature?

Back

Temperature is the average kinetic energy of the particles in a substance.

Front

How does a lava lamp work?

Back

A lava lamp works through convection, where heated liquid rises and cooler liquid sinks, creating a flow.

Front

What happens to particles when they are heated?

Back

When particles are heated, they gain energy, move faster, and spread apart, increasing the temperature.

Front

What is density?

Back

Density is the mass of an object divided by its volume, indicating how much matter is packed into a given space.

Front

How does heat transfer affect density?

Back

As substances are heated, they often expand, decreasing their density, which can cause them to rise in a fluid.