energy

• How many different energy stores are mentioned?

  Eight different energy stores
• Name three energy stores mentioned in the video.

  Kinetic, thermal, gravitational potential
• What happens to gravitational potential energy when a ball is dropped?

  It decreases as kinetic energy increases
• What is the equation for kinetic energy?

  E = $\frac{1}{2}mv^2$
• What does the variable 'm' represent in the kinetic energy equation?

  Mass of the object
• What is the equation for gravitational potential energy?

  E = mgh
• What does 'g' represent in the gravitational potential energy equation?

  Gravitational field strength
• What is specific heat capacity?

  Energy to raise 1 kg by 1°C
• What is the equation for change in energy related to specific heat capacity?

  Change in energy = mcΔT
• What does 'ΔT' represent in the specific heat capacity equation?

  Temperature change
• What is the conservation of energy principle?

  Energy cannot be created or destroyed
• How does power relate to work done?

  Power is the rate of doing work
• What is conduction?

  Heat transfer in solids through particle vibration
• What is convection?

  Heat transfer in liquids and gases
• What is the efficiency equation?

  Efficiency = useful output / total input
• What does it mean if a light bulb is 80% efficient?

  80 watts of useful light from 100 watts
• What are renewable energy resources?

  Resources that can be replenished naturally
• Name two renewable energy sources.

  Solar power and wind power
• What is the National Grid?

  System for distributing electricity
• What is the purpose of a step-up transformer?

  To increase voltage and reduce resistance
• What happens to voltage in a step-down transformer?

  Voltage is decreased for safe home use
• What are the pros of renewable energy resources?

  They do less environmental damage
• What are the cons of non-renewable energy resources?

  They can cause environmental damage
• What is the role of the National Grid in electricity distribution?

  Distributes electricity across the country
• How does energy conservation relate to the universe?

  Energy amount remains constant since creation