Energy Flashcards
Give 2 examples of energy transformations
Wood fire = chemical > heat + light ( waste )
Speaker = electrical > sound + heat ( waste )
Name 6 types of potential energy
Chemical Nuclear Gravitational Elastic Electrical Magnetic
What is the law of conservation of energy?
Energy cannot be created or destroyed.
It can only be transformed from one form to another
What is a Sanky diagram
They show how energy is transformed into useful and waste in a graphical form
Power = ?
Example: Engine transfers 3000J over a minute ( 60 s).
Calculate power
Power (watts ) = energy transferred ( joules ) /
/ time taken(s)
Example: P= E/T
= 3000/ 60
= 50 watts
Name 4 types of kinetic energy
Kinetic
Thermal
Sound
Light
Name 4 non renewable energy resources
Fossil Fuels- Coal
- Oil
- Gas
Nuclear
Name 6 renewable energy resources
Wind Solar Tidal Hydroelectric Geothermal Biomass/Biofuel
How does non-renewable recourses work
- Boiled water- steam drives all turbines
- Turbine connected to generator
- Magnet coil turns in generator
- Generator produces electricity
How does renewable energy resources work
- Wind/ Sun/ Tidal ( whatever resource) drives all turbines
- Turbine connected to generator
- Magnet coil turns in generator
- Generator produces electricity
Advantages of fossil fuels
- non-renewable
- high energy density
- on & off when want
Advantages of Nuclear
- non-renewable
- VERY high energy density
- on & off when want
Disadvantages of Fossil fuels
- Non- renewable , will run out
* Produces green house gases- contribute to global warming
Disadvantages of Nuclear
- Dangerous
- releases radiation- cancer- will kill you
- extra security needed- expensive
- non renewable- will run out
Advantages of renewable energy resources
- Don’t produce green house gases- not contributing to global warming
- Renewable- won’t run out
