Science Ch. 4 Test

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) where heated particles rise and cooler particles sink.

Front

What are convection currents?

Back

Convection currents are the circular movements of fluid caused by the rising of heated particles and the sinking of cooler particles.

Front

What is conduction?

Back

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

Front

What is radiation?

Back

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

Front

Can convection occur in empty space?

Back

No, convection cannot occur in empty space because it requires a medium (liquid or gas) to transfer heat.

Front

What is thermal energy?

Back

Thermal energy is the total energy of all the particles in a substance, related to its temperature.

Front

What is heat?

Back

Heat is the transfer of thermal energy from one substance to another due to a temperature difference.

Front

What is an example of convection in everyday life?

Back

An example of convection is boiling water, where hot water rises to the top and cooler water sinks.

Front

What role does temperature play in convection?

Back

Temperature affects the density of fluids; warmer fluids are less dense and rise, while cooler fluids are denser and sink.

Front

What is the difference between conduction and convection?

Back

Conduction transfers heat through direct contact, while convection transfers heat through the movement of fluids.