Free Printable P2 Sankey Diagrams and Efficiency

1.

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

a)

True

b)

False

2.

What is this diagram called?

a)

Stankey Diagram

b)

Sankey Diagram

c)

Smelly Diagram

d)

Some sort of Diagram

3.

Where does most of the energy go in this transformation.

a)

Electrical energy

b)

Light

c)

Heat

d)

other

4.

Where does most of the energy go for this transformation.

a)

heat

b)

electrical

c)

light

d)

joules

5.

What type of device might this Sankey be about?

a)

A very efficient LED light bulb

b)

A very inefficient incandescent light bulb

c)

A coal power plant

d)

A wind turbine

6.

What might a title be for this sankey?

a)

Electrical energy

b)

Efficient light bulb

c)

25 Joules of heat

d)

Sankey for a good heater.

7.

What type of device might this Sankey be about?

a)

A very efficient LED light bulb

b)

A very inefficient incandescent light bulb

c)

A coal power plant

d)

A wind turbine

8.

What type of energy is best represented by a battery?

a)

Sound

b)

Thermal

c)

Mechanical

d)

Chemical

9.

Identify the energy transfer

a)

electrical to chemical to light

b)

kinetic to potential

c)

chemical to electrical to light

d)

light to sound

10.

Identify the energy transfer

a)

chemical to kinetic

b)

solar to electrical

c)

thermal to light

d)

electrical to light

11.

When you eat food, your body gains ___________ energy.

a)

electrical

b)

chemical

c)

thermal

d)

light

12.

What type of energy can be sensed by the eyes?

a)

sound

b)

thermal

c)

electrical

d)

light

13.

What word or words describes kinetic energy?

a)

Energy of position

b)

stored energy

c)

movement

d)

not moving

14.

Fire is an example of what two energies?

a)

Electrical and Sound

b)

Mechanical and Sound

c)

Light and Thermal

d)

Chemical and Elastical

15.

Which of these equations is correct?

a)

$efficiency\ =\ \frac{useful\ energy\ transferred}{total\ energy\ transferred}$

b)

$efficiency\ =\ \frac{total\ energy\ transferred}{useful\ energy\ transferred}$

c)

$energy\ =\ efficiency\ \times100\%$

d)

$efficiency\ =\ \frac{wasted\ energy\ transferred}{total\ energy\ tranferred}$

16.

Which bulb is the most efficient?

a)

Filament bulb

b)

LED light

c)

CFL lamp

17.

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

a)

100%

b)

7%

c)

93%

d)

95%

18.

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

a)

5%

b)

50%

c)

55%

d)

100%

19.

A hairdryer uses 300J of energy to produce 60J of sound energy and 240J of thermal energy. Calculate it's efficiency.

a)

80%

b)

90%

c)

20%

d)

100%

20.

An iPhone charger coverts 75J of electricty in to 50J of charge and 25J of thermal energy. How efficient is the charger?

a)

10%

b)

100%

c)

33%

d)

67%

P2 Sankey Diagrams and Efficiency

Total questions: 20

Worksheet time: 40mins

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