Conduction and Convection Flashcards
Energy (15 cards)
What is conduction?
The process where vibrating particles transfer energy to neighboring particles.
In which states of matter does conduction primarily occur?
Solids.
What happens to particles in an object when it is heated?
They vibrate more and collide with each other.
What is thermal conductivity?
A measure of how quickly energy is transferred through a material.
Fill in the blank: Energy transferred to an object by heating is transferred to the _______ of the object.
thermal store.
What is convection?
The movement of energetic particles from hotter to cooler regions.
In which states of matter does convection occur?
Liquids and gases.
What causes the density of a region being heated to decrease?
Particles move faster and the spacing between individual particles increases.
What can be created when there is a constant heat source in a liquid or gas?
A convection current.
How do radiators create convection currents?
By transferring energy from the radiator to nearby air particles by conduction.
What happens to the air particles near a radiator?
They become warmer and less dense.
Fill in the blank: The cooler air is then heated by the _______.
radiator.
What occurs to the previously heated air in a room?
It transfers energy to the surroundings and cools down.
True or False: Convection can occur in solids.
False.
What is the result of the cycle of heating and cooling in a room with a radiator?
A flow of air circulates around the room, creating a convection current.
