Topic 1 Energy Flashcards
What is nuclear energy store?
The energy stored in the nucleus of an atom
What is another word for thermal energy store?
Internal
What are the 4 types of work done?
- mechanical work
- electrical work
- heating
- radiation
What is mechanical work?
Energy transferred on an object by a force
What is radiation?
Energy transferred as a wave
What is work done?
When Energy is transferred
What is specific heat capacity?
Amount of energy required to raise 1kg of substance by 1 degree Celsius
What is another term for energy transferred?
Work done
The higher the thermal conductivity of a material …
The higher the rate of energy transfer by conduction across the material
What are some ways of reducing thermal energy transfer from a building?
- use materials with low thermal conductivity:
- thick walls with a cavity filled with insulating material
- double glazed windows
- loft insulation
What are the 3 main uses of energy?
- transport
- electricity generation
- heating
What are the 3 main fossil fuels?
- coal
- oil
- gas
What are the advantages of using fossil fuels as energy resources?
- cheap
- versatile
- reliable
What are the disadvantages of using fossil fuels as energy resources?
- release CO2 - climate change
- non-renewable
- release pollutants
Why type of energy resource is nuclear power?
Non-renewable
What are the advantages of using nuclear power as an energy resource?
- doesn’t release CO2
- very reliable
What are the disadvantages of using nuclear power as an energy resource?
- dangerous radioactive materials - disaster if released
- generates radioactive waste - has to be stored for thousands of years
- expensive
What is a renewable energy resource?
An energy resource that can be replenished as it is used
What are the 7 renewable energy resources?
- wind power
- solar power
- hydroelectric power
- tidal power
- biofuels
- geothermal
- wave power
What are the advantages of using renewable energy resources?
- never run out
- don’t release CO2
Which renewable energy resources are not reliable?
Wind and solar power
What are biofuels produced from?
Plant materials
What is power?
Rate of energy transfer
What can be used to reduce friction between objects (unwanted energy transfer)?
Lubrication
