energy

• What is the principle regarding energy in physics?

  Energy cannot be created or destroyed
• How can energy be transferred?

  Energy can only be transferred from one form to another
• What happens when we 'destroy' energy?

  It dissipates into the surrounding environment
• What is the term used when energy is lost?

  Dissipation
• What is the relationship between energy transfer and the environment?

  Energy loss dissipates into the environment
• What is the arrangement of gas particles?

  Gas particles are arranged loosely
• What is the role of the Sun in relation to radiation?

  The Sun is a nuclear reactor using radiation
• What type of radiation does the Sun use to transfer heat to Earth?

  Infrared radiation
• How is radiation defined?

  Energy spreading out from a source
• What type of wave is radiation?

  It is a wave that does not need particles
• How can heat energy be transferred?

  Through infrared radiation
• What are the characteristics of infrared waves?

  • Travel through a vacuum
  • Travel at $300,000,000 \text{ m/s}$
  • Can be reflected
  • Cannot travel through opaque objects
• What surfaces are better at emitting thermal radiation?


  Some surfaces are better than others
• What is the order of materials in terms of thermal radiation emission?

  1. Silver
  2. Mott iron oxide
  3. Block
• What is hydric power derived from?

  Water
• What is solar power derived from?

  Sun
• What are fossil fuels composed of?

  Coal, oil, gas
• What does heat refer to in energy resources?

  Temperature
• What is nuclear energy derived from?

  Nuclear reactions
• What energy resource is derived from wind?

  Wind power
• What is sound energy?

  Energy from sound waves
• What is light energy derived from?

  Light waves
• What is bio-fuel?

  Fuel from biological materials
• What is geothermal energy derived from?

  Heat from the Earth
• What are the two main categories of energy resources?

  Non-renewable and renewable
• Why are non-renewable fuels a concern?

  They will run out over time
• What is a key characteristic of renewable energy resources?

  They can be replenished continuously
• What are the pros of renewable energy sources?

  • Wind: renewable
  • Solar: renewable
  • Geothermal: renewable
  • Wave: always available
  • Tidal: always available
  • Hydro: renewable
• What are the cons of renewable energy sources?

  • Reliance on wind
  • Possible cloud cover
  • Location-dependent effectiveness
  • Potential impact on migration
• How is thermal energy measured?

  It is the measurement of thermal energy using vibrations.
• What state of matter is associated with thermal energy measurement?

  Solids
• What unit is used to measure energy in the study material?

  Kilojoules
• What term describes energy related to heat?

  Thermal
• What is the formula for power?

  Power = Energy transferred / time
• How is power measured in terms of energy and time?

  Watts = J/ seconds
• In what unit is power measured?

  Watts
• What does an energy transfer of 1 joule/s equal?

  1 watt
• What is the energy measurement used by electricity meters?

  kWh
• How is kWh calculated?

  kWh = kW x hours
• What unit is used to measure power?

  Watts