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16 Cards in this Set

  • Front
  • Back
State 3 methods of heat transfer
a. Conduction
b. Convection
3. Radiation
What is conduction?
the transfer of heat from particle to particle which mainly occurs in solids
What are conductors?
materials good conductors of heat and heat can flow through them easily
What are insulators?
materials poor conductors of heat and heat cannot flow through them easily
What is convection?
the transfer of heat in a liquid or gas by the upward movement of hot particles from one place to another
What is the circulating movement of water or air called?
convection current
Explain how convection occurs
When the water is heated, the particles move faster and further apart. The hot water is less dense then the cold water. Therefore, hot water rises and cold water sinks.
What if air-conditioner is place at the bottom of the wall?
No convection current
Can convection occur in solids?Why?
No, because in solids, the particles are closely packed together and they are not free to move from one place to another
Give 3 characteristics of conduction
a. Occur in solids
b. Heat can flow in any direction
c. Heat energy is transferred from particle to particle
Give 3 characteristics of convection
a. occur in fluids
b. heat flow upwards
c. hot particles move freely and carry energy upwards
What is radiation?
the transfer of heat without help of particles
What is a good absorber of heat radiation?
black or dull surfaces
What is a good emitter of heat radiation?
black or dull surfaces
What is a poor absorber of heat radiation?
white or shiny surfaces
What is a poor emitter of heat radiation?
white or shiny surfaces