Energy transfer

Front

Who got all the options right? Options: A, B, C

Back

B

Front

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

Back

True

Front

What is this diagram called?

Back

Sankey Diagram

Front

Which bulb is the most efficient? Options: Filament bulb, LED light, CFL lamp

Back

LED light

Front

Where does most of the energy go for this transformation?

Back

light

Front

The energy efficiency shown in this diagram is:

Back

About 60%.

Front

What type of device might this Sankey be about? Options: A very efficient LED light bulb, A very inefficient incandescent light bulb, A coal power plant, A wind turbine

Back

A very inefficient incandescent light bulb

Front

Which fraction best describes, of the part of the gasoline that is put into a car, that actually makes the car move? Options: 4/10, 1/4, 2/4, 3/5

Back

1/4

Front

If this household wanted to use less energy, where should they first focus their efforts? Options: Water heater, Better lighting, Unplugging electronics, More efficient air conditioning

Back

More efficient air conditioning

Front

An iPhone charger converts 75J of electricity into 50J of charge and 25J of thermal energy. How efficient is the charger?

Back

67%