Energy Resources And Energy Transfers Flashcards
8 Energy stores
Chemical
Kinetic
Gravitational
Elastic
Thermal
Magnetic
Electrostatic
Nuclear
4 Energy Transfers
Electrically
Mechanically
By heating
By radiation
Conservation of energy
Energy cannot be created or destroyed just transferred from one store to another
What is conduction
Conduction is the transfer of energy by vibration of particles colliding with eachother in a substance
What is convection
Convection is when particles with more heat energy displace particles with less heat energy forming a cycle/current. Happens in water and gas
What is radiation
Radiation is the transfer of energy by inferred waves that travel very quickly in straight lines
What surfaces are good reflectors and bad absorbers + emitters
Shiny light
What surfaces are bad reflectors and good absorbers + emitters
Dark, matt
What does being a poor conductor prevent
Heat transfer by conduction
What does trapped air prevent
Prevents a convection current from occurring (i.e a vacuum)
What does a decrease in GPE mean and why
An increase in KE because of conservation of energy
Define power
The rate of work done
