Sankey diagrams

True or False. Energy cannot be created or destroyed, rather it is transformed from one energy type to another.

• True

• False

What units are used to measure energy?

• Watts
• Newtons
• Joules
• kilowatts

What is this diagram called?

• Stankey Diagram

• Sankey Diagram

• Sankay Diagram

• Samkay Diagram

Where does most of the energy go in this transformation.

• Electrical energy
• Light
• Heat
• other

Where does most of the energy go for this transformation.

• heat
• electrical
• light
• joules

What might a title be for this sankey?

• Electrical energy
• Efficient light bulb
• 25 Joules of heat
• Sankey for a good heater.

What type of device might this Sankey be about?

• A very efficient LED light bulb
• A very inefficient incandescent light bulb
• A coal power plant
• A wind turbine

Which bulb is the most efficient?

• Filament bulb

• LED light

• CFL lamp

In a coal fired power station the first step is to burn coal to heat water. Which Sankey diagram could be used to represent this step?

• 
• 
• 
• 

Efficiency is...

• The percentage of energy that is actually used to do work
• The stuff in the walls that keeps energy in