Heat and Thermal Energy

Front

What is Specific Heat?

Back

Specific Heat is the amount of energy required to raise the temperature of a unit mass of a substance by one degree Celsius.

Front

What happens to the molecules of a substance when it is heated?

Back

The molecules speed up and the temperature of the substance increases.

Front

What type of heat transfer occurs when the sun heats your body?

Back

Radiation is the transfer of heat through electromagnetic waves, such as sunlight.

Front

What is Convection?

Back

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

Front

What happens to the temperature of water when its molecules slow down in the freezer?

Back

The temperature of the water decreases as the molecules lose energy.

Front

What is Conduction?

Back

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

Front

What is the difference between Conduction and Convection?

Back

Conduction occurs in solids through direct contact, while convection occurs in fluids through the movement of the fluid itself.

Front

What is Radiation?

Back

Radiation is the transfer of energy through space by electromagnetic waves, without the need for a medium.

Front

How does a hot air balloon rise?

Back

A hot air balloon rises due to convection; the air inside the balloon is heated, becomes less dense, and rises.

Front

What is the relationship between temperature and molecular movement?

Back

As temperature increases, the movement of molecules increases; as temperature decreases, molecular movement slows down.