Conduction

Question 1

What is conduction?

Answer 1

conduction is when heat is transfered from one place to another via kinetic energy

Question 2

what material is a good conductor

Answer 2

Metals are good conductors of heat

Question 3

what materials are not good conductor

Answer 3

non-metals and gases are usually poor conductors.

Question 4

what are poor conductors called?

Answer 4

Poor conductors are called insulators.

Question 5

what direction is heat energy conducted along a metal bar?

Answer 5

Heat energy is conducted from the hot end of an object to the cold end.

Question 6

free electrons and conduction in metals

Answer 6

The electrons in a piece of metal can leave their atoms and move about in the metal as free electrons. The parts of the metal atoms left behind are now positively charged metal ions.

Question 7

kinetic energy

Answer 7

The ions are packed closely together and they vibrate continually. The hotter the metal, the more kinetic energy these vibrations have. This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons.

These move through the structure of the metal, colliding with ions as they go.