Heat Flashcards
What is heat?
Heat is a form of energy that is the movement of atoms and molecules in any material.
The faster the atoms are moving, the higher the temperature it contains.
AND…the greater the amount of energy present as heat.
BASICALLY, HEAT is the energy of moving atoms.
what is temperature
is the measurement of degree substance or object
3 types of heat transfer?
convection, conduction,radiation
what is convection?
Convection is heat transfer when heat rises up and cools off which causes the molecules to move slower and sink to sink
what is radiation?
Radiation is heat transfer when heat travels on waves
what is conduction?
Conduction is heat transfer when two things are touching
what is kinetic energy?
is the energy of moving object
What is thermal energy?
Thermal energy is the total amount of energy in an object.
Use the particle theory to explain what happens when a warm object comes in contact with a cold object
When something warm comes in contact with something colder, the movement of the particles of the warmer object ‘excites’ or makes the colder particles move faster, transferring kinetic energy. This will allow the warmer object to lose energy (cool off) and allows the colder object to gain energy (warm up).
what is thermal expansion?
As the particles of an object begin to gain energy, particles move faster and farther apart. The more the movement of the particles, the more heat it gains…the more kinetic energy it has. More energy means the particles are getting farther apart, and the object can now expand and gain volume.
what is thermal contraction?
As the particles of an object begin to lose energy, particles move slower and closer together. The less the movement of the particles, the more heat it loses…the less the kinetic energy it has. Less energy means the particles are getting closer together, and the object can now contract and lose volume.
what is a conductor?
an object that allows heat to travel through it
what is an insulator?
a material that does not allows heat to travel through it as well as a conductor.
can heat be transformed or transferred?
yes, Heat is a form of energy that can be transformed and transferred but cannot be given to something else
particle theory
- All matter is made up of invisible particles.
- Particles have spaces between them.
- Particles are moving all the time.
- Solid particles are vibrating while liquid and gas particles slide past each other.
- Particles move faster and farther apart when they are heated.
- Particles move slower and closer together when cooled.
