Energy Types
How do we measure energy (units)?
Joules.
Energy moves by
transfer
What is non-renewable energy?
The energy that can only be used once and not reproduced.
The Law of Conservation of Energy says:
Energy cannot be created or destroyed.
When energy changes from one type to another we say it has been...
transformed
What do we call energy that is waiting to be used?
Potential energy
When you turn on the microwave:
electrical energy is required.
Heat and sound energy are produced.
What is renewable energy?
The energy sources are often natural and can be reproduced and used multiple times.
Energy __________ is a calculation of the percentage of useful energy transformed.
efficiency
flow diagrams
What do we call movement energy?
Kinetic energy
The more mass = the more kinetic energy
Name 1 type of renewable energy
Answers vary
The word efficient is best defined as
completed without any unnecessary by-products or side effects.
Light bulbs require and released several different types of energy.
Electrical energy is....
What kind of energy do we associate with an electric charge.
electrical energy
What is an example of an energy transformation that produces light but not for us to see.
a remote control.
Name 1 type of non-renewable energy
Various answers
What is the correct formula to determine energy efficiency?
Useful energy output / energy input x 100
Draw a flow diagram of energy transformation for a toaster.
When listening to music on your phone, what type of energy are you interested in?
sound energy
Headphones and speakers convert electrical energy into kinetic energy to produce sound energy. An example of the opposite flow of energy transformations would be produced by:
Microphones
Give 2 reasons why we should use more renewable energy sources
various answers
If a light bulb has an input of 350 units and is considered 90% efficient would have an output of
385 units of energy.
A hydro-electric power plant converts the energy of falling water by transforming
gravitational potential energy into electrical energy..