ENERGY

• The match converts chemical energy into kinetic, heat, light, and sound energy.

  True
• What does the acronym GEECS LUNCH OLDHAM IT stand for in the context of energy types?

  Gravitational, electrical, elastic, kinetic, sound, light, nuclear, chemical, thermal
• In a phone, electrical energy is stored as chemical energy.
• What type of energy is stored in fireworks?

  Chemical
• The law of conservation of energy states that energy cannot be created or destroyed.
• The energy used today has existed since the start of the universe.


  True
• Kinetic energy is measured in joules.
• What is the formula for kinetic energy?

  $\frac{1}{2}mv^{2}$
• In the kinetic energy formula, velocity is squared, not the entire term.


  True
• The spring constant in elastic potential energy is measured in newtons per meter.
• The gravitational field strength is approximately 9.8 newtons per kilogram.
• What is the formula for elastic potential energy?

  $\frac{1}{2}kx^{2}$
• What is the formula for gravitational potential energy?

  $mgh$
• Gravitational potential energy increases with height.

  True
• What is the formula for change in thermal energy?

  $mc\Delta T$
• Specific heat capacity is measured in joules per kilogram per degree Celsius.
• What is the formula for power in terms of energy and time?

  $\frac{E}{t}$
• Power is measured in watts.
• Energy can be wasted when it is transformed into an unintended form, such as heat in a light bulb.


  True
• What happens to wasted energy when it dissipates into the surroundings?

  It spreads out
• Match the type of wasted energy with its example:

  Heat ↔️ Light bulb

  Sound ↔️ Motor

  Friction ↔️ Moving parts
• An infrared camera can detect heat escaping from poorly insulated areas, showing them in red.
• New houses are designed to be more energy-efficient than old houses.


  True
• What are some examples of energy-efficient adaptations for old houses?

  Cavity wall insulation, double glazing, loft insulation
• Efficiency is calculated as useful energy output divided by total energy input.
• Efficiency can be expressed as a percentage or a decimal.


  True
• What is the formula for efficiency in terms of power?

  $\frac{Useful\,power\,out}{Total\,power\,\in}$
• Match the renewable energy source with its example:

  Solar ↔️ Sun

  Wind ↔️ Turbines

  Water ↔️ Tidal power

  Geothermal ↔️ Volcanic heat
• Renewable energy sources will not run out.
• Fossil fuels are examples of finite energy sources.


  True
• What is a major advantage of renewable energy sources?

  They don't release CO2
• Solar power is ineffective at night.
• Wind turbines are unpopular in some areas due to their appearance.


  True
• Fossil fuels take millions of years to create.
• Where can geothermal power be used effectively?

  Volcanic countries
• Nuclear power produces radioactive waste that must be stored safely.


  True