Conduction and Convection in the Home Flashcards
2) Particles which vibrate faster pass on…?
Extra kinetic energy to neighbouring particles (these particles then vibrate faster)
1) How does conduction occur in a solid?
When particles vibrate in a solid, energy is passed on by collisions with other particles
3) The continuous conduction process results in…?
The extra kinetic energy (or heat) is spread throughout the solid resulting in a rise in temperature to the other side of the solid
4) What is the definition of conduction?
Conduction of heat is the process where vibrating particles pass on extra kinetic energy to neighbouring particles
5) Why do metals make good conductors?
They have free electrons, heating makes electrons move faster and collide with other electrons, transferring energy (this process repeats)
6) Transferring energy between free electrons is much faster than…?
Transferring energy between neighbouring atoms
7) Most non-metals don’t have free electrons so…?
Warm up more slowly (making them good for insulating things)
8) Because the particles in gases and liquids aren’t held to tightly together…?
Heat is conducted more slowly (make good insulators)
9) Where does convection occur?
Only in liquids and gases
10) When a liquid or a gas is heated the particles move faster and…?
The solid (liquid or gas) expands becoming less dense
11) Warmer, less dense fluid…?
Rises above the colder, denser surroundings
12) As warm fluid rises…?
Cooler fluid takes its place
13) The process of warm fluid rising and being replaced by cooler fluid forms a…?
Convection current
14) What is the definition of convection?
Convection occurs when the more energetic particles move from the hotter region to the cooler region-and take there heat energy with them
15) Why can’t convection occur in solids?
The particles in a solid cannot move around, only vibrate on the spot
