Topic 3 - Conservation of energy Flashcards
1
Q
What happens when an object is heated?
A
Energy is transferred to its thermal energy store (temperature increases)
2
Q
How is heat transferred in solids?
A
Through conduction:
vibrating particles transfer energy to neighbouring particles
3
Q
What happens to the particles in a metal when they are heated
A
Energy is transferred to the metal in the kinetic energy store (vibrations)
4
Q
Why can conduction only occur in solids?
A
Particles in a solid are held together very densely meaning there are a lot of collisions to pass on energy
5
Q
What is thermal conductivity
A
It is how well objects transfer energy by conduction.
- Metals have high conductivity (transfer heat energy quickly)
- Plastics have low thermal conductivity (used as insulators)
6
Q
A
