Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What sort of appliances generally use the most energy?
   • Heating appliances use a lot of Energy.
2. What does the amount of energy transferred depend on?
   • The amount of Energy transferred by an appliance depends on the power rating of the appliance and the duration.
3. What is the equation for calculating energy?
   • Energy = power x time
4. How many Joules are there in a kilojoule?
   • There are 1000 joules in a kilojoule.
5. What is a kilowatt hour? What units are used?
   • The amount of Energy transferred in one hour. kWh.
6. How is the amount of energy used by a customer measured?
   • The amount of electrical Energy used by a customer is measured by an electrical meter.
7. What is the equation for calculating the cost of electricity?
   • The cost of electricity is equal to number of units x cost per unit.
8. What is the rough cost of an electrical unit?
   • The cost of an electrical unit is around 15p. The cost of Gas is around 4p per kWh, which is why it is preferred for heating applications.