Efficiency

Efficiency

8th Grade

15 Qs

quiz-placeholder

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Efficiency

Efficiency

Assessment

Quiz

Science

8th Grade

Practice Problem

Hard

NGSS
MS-PS3-4, MS-PS3-5, HS-PS3-1

+4

Standards-aligned

Created by

Lisa Thompson

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of diagram is used to show energy efficiency?

Bar chart

Sankey diagram

Flow chart

Power diagram

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How do we calculate percentage efficiency?

(useful energy out ÷ total energy in) × 100

(useful energy in ÷ total energy out) x 100

(total energy out ÷ useful energy in) x 100

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Calculate the efficiency of a bulb with an input energy of 50J, which outputs 40J of thermal energy and 10J of light energy.

10%

20%

25%

50%

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which bulb is the most efficient?

Filament bulb

LED light

CFL lamp

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

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

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What might a title be for this sankey?

Electrical energy

Efficient light bulb

25 Joules of heat

Sankey for a good heater.

Tags

NGSS.MS-PS3-5

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

80%

90%

20%

100%

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