power

Cards (11)

  • power - the rate of change in energy
  • watt (W) - unit for measuring power
  • devices that can transform energies into other forms in a shorter period of time has more power
  • electrical power - the rate at which electrical energy is used by a load
    • eg. appliances (washing machines, TV)
  • phantom load - electrical energy devices use when it is turned off
    • eg. stand-by mode on TVs
  • kilowatt-hour (kWh) - a larger unit of energy
  • smart meter - an electrical energy meter that measures how energy use changes in a building over the course of the day; the power company charges a fixed amount of money for every kWh of electrical energy used
  • renewable energy source - an energy source that is available on a continuous basis
    • eg. sunlight, wind, river flow, tides + waves, geothermal sources, biomass
    • provide sustaining options for generating electrical energy
  • nonrenewable energy source - an energy source that is non-replaceable in a human lifetime
    • eg. coal, natural gas, uranium (nuclear reactions)
  • sustainable energy system - a sustainable way of perceiving, producing, and using energy
    • ensures that the extraction, production, and use of energy have limited impact on environmental/human health
    • less reliance on nonrenewable sources
    • ensures the availability of renewable + reliable energy sources for current + future generations
    • provide access to affordable energy for Earth's entire population
  • First Peoples EBM
    • respect + responsibility - make respectful decisions of the natural world + responsible use of resources
    • intergenerational knowledge - listen to elders + share knowledge between generations
    • balance + interconnectedness - balance ensures future generations are considered, interconnectedness takes many relationships with an ecosystem into consideration
    • giving + receiving - give thanks for natural resources recognizes their value, benefits of resources are share in communities