Student Unit E3
Delivering Power to the People
Unit E3 Focus Words
transformation
noun – when studying energy, the change from one form of energy to another
Hydroelectric dams are one place where an energy transformation occurs. Can you describe it?
generate
verb – to produce
Electricity can be generated from the energy of flowing water. What else generates electricity?
power
noun – work done in a certain amount of time (joules per second if the power is measured in watts)
Does it take more power to pedal up a hill slowly or quickly? Why?
fuel
noun – the material that is used up to produce power
Fuels store energy. How is food a fuel? How is gasoline a fuel?
efficiency
noun – the ratio of the useful work performed by a device to the total amount of energy it uses
How does technology improve your efficiency at completing schoolwork?
conservation
noun – the idea that the total value of energy stays constant in a system
Considering the conservation of energy, what happens to the energy that goes into a car crash?
charge
noun – a property of matter responsible for electric and magnetic forces
When is matter considered charged?
current
noun – the flow of electricity
How do batteries create an electric current?