Heat Transfer Flashcards
What is thermal energy?
Thermal energy is the energy of moving particles, felt as heat.
How does heat always move?
Heat always moves from a warmer object to a cooler one, which is called heat transfer.
What happens to an object when heat moves into it?
The object becomes warmer.
What happens to an object when heat moves out of it?
The object becomes cooler.
What are the three methods of heat transfer?
Conduction, radiation, and convection.
What is conduction?
Conduction is the transfer of heat between things that are touching.
What are conductors?
Conductors are objects that allow heat to move through them easily, such as metals.
What are insulators?
Insulators are objects that do not allow heat to move through them easily, such as plastics, Styrofoam, wood, air, and foam.
What is convection?
Convection is the transfer of thermal energy through liquids or gases, creating convection currents as warmer air or water rises and cooler air or water sinks.
What is radiation?
Radiation is the transfer of energy through electromagnetic waves, such as infra-red radiation from the sun heating objects on Earth.
How does the Particle Model of Matter explain conduction?
In conduction, particles in a solid vibrate in place and transfer energy to neighboring particles.
How does the Particle Model of Matter explain convection?
In convection, particles in a fluid (liquid or gas) move more freely, allowing warmer particles to rise and cooler particles to sink, creating a current.
How does the Particle Model of Matter explain radiation?
Radiation involves the transfer of energy through electromagnetic waves, which behaves differently from particle motion in conduction and convection.
