Review quiz on energy forms and efficiency

Which of these types of energy refer to energy that is stored to be used?

• Chemical potential energy

• Luminous energy

• Electrical energy

• Gravitational potential energy

The unit for energy is...

What is the efficiency of a kettle that has an energy input of 800 J and 600 J is used to heat up water until boiling?

• 25%

• 125%

• 75%

• 56,7%

What energy source does NOT generate electricity by converting kinetic energy with a generator?

• Solar energy

• Wind energy

• Nuclear energy

• Geothermal energy

Which types of power plants gain energy from nuclear potential energy? Multiple answers are possible.

• coal fueled power plant

• solar panel power plant

• geothermal power plant

• nuclear power plant

What is your favorite fruit?

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While riding a bike, some of the input energy is lost to friction between the gears. In what form of energy is the energy loss?

• Nuclear energy

• Chemical energy

• Thermal energy

• Kinetic energy

Which lightbulb is more efficient?

• A

• B

• It's impossible to tell

What is the efficiency of this windmill turbine?

• 20%

• 18%

• 38%

• 62%

How can the efficiency of this wind mill turbine be increased?

• Use oil to reduce friction

• Wrap electrical wiring to avoid heat loss

• Only turn it on on windy days

• Build them higher to catch more wind.