12.3 ENERGY TRANSFER: CONDUCTION Flashcards
What is conduction?
Transfer of energy in solids
What are conductors?
Energy transfers quickly through them
Ex. Metals
What are insulators?
Energy transfers slowly through them
Ex. Wood, plaster, paper, cloth
Why are insulators bad at transferring energy?
In these solids, the particle arrangement is not as fixed nor as tightly packed like in a conductor.
Why do objects feel hot to the touch when the object is an insulator?
Heat transfers slowly away from the point of contact
Why do objects feel cold to the touch when the object is a conductor?
Because heat transfers quickly away from the point of contact.
Do the atoms nearest to the area vibrate vigorously when metal is heated?
Yes
Do the atoms furthest to the area vibrate vigorously when metal is heated?
No
Why do the atoms furthest from the area where metal is heated vibrate less vigorously than when the atoms are nearest to the area of heat?
The area where heat is applied is the hottest. Energy transferred from hotter region to colder region.
Do electrons transfer energy in metals?
Yes
Are liquids and gases good or poor conductors?
Poor
