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Devices that Convert Energy
Worksheet
Grade Level
Grade 4
4.10 Devices that Convert Energy
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A class compares devices. Which explanation correctly describes why a hair dryer is useful for the task of blowing warm air?
A
It stores thermal energy and motion energy without changing any energy
B
It changes electrical energy into thermal energy and motion energy, which matches the task
C
It changes thermal energy and motion energy back into electrical energy for every job
D
It works because energy disappears after the device starts
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