Transfer of Heat Energy Flashcards
1
Q
Explain how conduction works?
A
particles vibrate more
particles collide into their neighbours
energy passes along material
2
Q
Why is a vacuum the worst conductor of heat?
A
no particles to transfer energy
3
Q
Why are metals good conductors?
A
contain free-moving electrons
transfer kinetic energy much faster
4
Q
How does convection work?
A
particles heat up and move faster
density decreases
particles rise up and carry heat with them
5
Q
What can radiation travel through?
A
vacuum (empty space)
6
Q
What is heat radiation?
A
energy wave given out by hot objects
7
Q
What colour is a good emitter of radiation?
A
black
8
Q
What colour is a good absorber of radiation?
A
black
