Studied by 5 people
What are energy stores?
Energy that is transferred to an object which is stored in one of the object's energy store
Name all the energy stores (8)
kinetic
Thermal
Chemical
Gravitational
Elastic
Electric
Magnetic
Nuclear
Ways energy is transferred? define each term (4)
Mechanical work
↳ a 𝗳𝗼𝗿𝗰𝗲 moving an object
Electrical work
↳ 𝗰𝗵𝗮𝗿𝗴𝗲𝘀 moving due to P.D
Heating
↳ temperature difference, either electrically or due to a chemical reaction
Radiation
↳ energy transferred as a 𝘄𝗮𝘃𝗲
Define Dissipation
Ways that energy are wasted
What is the conservation of energy?
Energy can be transferred: usefully, stored, or dissipated, but cannot be created or destroyed- all energy was present at the big bang
Define thermal conductivity. What is the difference between high and low?
Tells us how effective an object is at allowing thermal energy to pass through:
𝗛𝗶𝗴𝗵 thermal conductivity- good 𝘤𝘰𝘯𝘥𝘶𝘤𝘵𝘰𝘳
𝗟𝗼𝘄 thermal conductivity- good 𝙞𝙣𝙨𝙪𝙡𝙖𝙩𝙤𝙧
What are the renewable energy sources (7)
wind
Solar
Hydro electric- dam
Tidal
Wave
Geothermal
Biomass- living organisms
Define renewable
A renewable energy resource which is being REPLENISHED as it is used
What are the non-renewable energy resources
-Fossil fuels (gas, coal, oil)
-Nuclear energy
Define system
An object or group of objects
How do you increase the efficiency of an energy transfer?
Thermal insulation
Energy is wasted through 𝘁𝗵𝗲𝗿𝗺𝗮𝗹 𝗲𝗻𝗲𝗿𝗴𝘆
↳ double glaze windows and insulate the house
Lubrication
Energy can be lost due to 𝗳𝗿𝗶𝗰𝘁𝗶𝗼𝗻 → oil
Streamlining
Objects travelling through air experience 𝗮𝗶𝗿 𝗿𝗲𝘀𝗶𝘀𝘁𝗮𝗻𝗰𝗲
↳Change the shape of the object so reduce the effect of air resistance
Why are energy resources used?
For:
Transport
Electricity
Heating
