Energy efficiency, energy calculations
Authored by Rebecca Wood
Science
8th Grade
Used 35+ times
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26 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
The law of conservation of energy states that energy cannot be__________________
transformed or transferred
created or destroyed
used or wasted
input or output
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Input energy is...
How well a device converts input energy into useful energy
Energy that is not used for something useful/ something we want
Energy that is used for something useful
Energy that goes into a device/ process
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Useful energy is...
How well a device converts input energy into useful energy
Energy that is not used for something useful/ something we want
Energy that is used for something useful
Energy that goes into a device/ process
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Wasted energy is...
How well a device converts input energy into useful energy
Energy that is not used for something useful/ something we want
Energy that is used for something useful
Energy that goes into a device/ process
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Energy efficiency is...
How well a device converts input energy into useful energy
Energy that is not used for something useful/ something we want
Energy that is used for something useful
Energy that goes into a device/ process
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
The units of energy are...
Joules
Grams
Watts
%
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Energy efficiency should be expressed as....
Joules
Grams
Watts
%
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