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Energy Efficiency

Authored by Dylan Luttrell

Science

8th Grade

NGSS covered

Used 906+ times

Energy Efficiency
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The law of conservation of energy states that when one form of energy is converted into another,

energy is destroyed in the process
no energy is destroyed in the process
energy is created in the process
some amount of energy cannot be accounted for

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In energy transformations, "wasted energy" usually takes what form?

heat
chemical energy
light
sound waves

Tags

NGSS.MS-PS1-4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Efficiency is calculated by useful energy output divided by total energy input, expressed as a percentage

False

True

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When is energy lost?

During transformations only

During transformations and transfers

During transfers only

During GPS outages

Tags

NGSS.MS-PS3-5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Energy efficiency of incandescent lightbulbs is

50%

25%

15%

5%

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

With wind-electric turbines, electric energy is turned into rotational energy.

True

False

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Energy efficiency of wind turbines is about

90%

75%

40%

12%

Tags

NGSS.MS-PS3-3

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