Efficiency

• 100%

• 80%

• 40%

• 10%

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

• 100%

• 7%

• 93%

• 95%

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

• 5%

• 50%

• 55%

• 100%

Tags

NGSS.MS-PS3-5

What type of device might this Sankey be about?

• very efficient LED light bulb

• very inefficient incandescent light bulb

• coal power plant

• wind turbine

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

The percent of energy that is used for work

• Energy efficiency

• Renewable energy

• Nonrenewable energy

• Combustion

Tags

NGSS.MS-PS3-5

Working in the best way with little wasted time or effort

• Hydroelectric

• Conservation

• Efficient

• Alternative Energy

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which among the following is the most energy-efficient?

• • Incandescent bulb

• • Fluorescent tube light

• • Compact fluorescent lamp

• • All are equally efficient.

Which of the following is an example of energy efficiency?

• Using LED bulbs instead of incandescent bulbs

• Leaving lights on when not in use

• Using a car with low fuel efficiency

• Heating an empty room

Tags

NGSS.MS-PS3-3

Which among the following is the most energy-efficient?

• • Incandescent bulb

• • Fluorescent tube light

• • Compact fluorescent lamp

• • All are equally efficient.

Grace is looking for ways to save on her energy bills. Which of the following is an example of energy efficiency?

• Using a high-wattage light bulb

• Insulating your home to reduce heating costs

• Leaving appliances on standby mode

• Driving a car with low fuel efficiency

Tags

NGSS.MS-PS3-3