Topic 4: Energy Resources and Energy Transfer Flashcards
(23 cards)
What is the principle of conservation of energy?
energy can be stored and transferred but it can NEVER be created or destroyed
total energy input =
useful energy output + wasted energy
What is conduction?
process where vibrating particles transfer energy from their kinetic store to the kinetic store of neighbouring particles
How can you reduce convection?
-stop fluid from moving (e.g. trapping pockets of air, insulation)
Black surfaces are good…
absorbers/ emitters of radiation
Shiny surfaces are poor…
absorbers/ emitters of thermal radiation
What is power?
the rate at which energy is transferred
What are the advantages of Nuclear power?
-doesn’t produce greenhouse gases
-uranium is in high supply
What are the advantages of Wind farms?
-cheap to run
-renewable (won’t run out)
-doesn’t release any polluting gases
What are the advantages of Geothermal power?
-renewable
-no environmental problems
What are the advantages of Fossil fuels?
-releases lots of energy (quite cheaply)
-reliable
-power stations already exist (easy/ cheap)
What are the advantages of Solar cells?
-renewable
-no pollution
What are the advantages of Wave power?
-no pollution
-renewable
-minimal running costs
What are the advantages of Tidal barrages?
-renewable
-no pollution
What are the advantages of Hydroelectric power?
-reliable
-low running costs
-renewable
What are the disadvantages of fossil fuels?
-release CO2
-releases sulphur dioxide
-non-renewable
What are the disadvantages of Nuclear reactors?
-expensive to build
-risks of radioactive leaks
-radioactive waste
What are the disadvantages of Wind farms?
-ruins the view
-noise pollution
-expensive to set up
What are the disadvantages of Geothermal power?
-costly
-only possible in a few places
What are the disadvantages of Solar cells?
-expensive
-small scale
-unreliable/ weather dependent
What are the disadvantages of Wave power?
-ruins view
-unreliable
-small scale
What are the disadvantages of Tidal barrages?
-destroys habitats
-ruins view
-amount of energy provided is unreliable
What are the disadvantages of Hydroelectric power?
-loss of habitat
-initially costly
-impacts environment (flooding)
