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Light and Heat Energy
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Restart
moon
natural
Oops!
Okay!
torch
artificial
Oops!
Okay!
oven
artificial
Oops!
Okay!
sun
natural
Oops!
Okay!
star
natural
Oops!
Okay!
flashlight
artificial
Oops!
Okay!
bulb
artificial
Oops!
Okay!
flat iron
artificial
Oops!
Okay!
fire
artificial
Oops!
Okay!
firefly
natural
Oops!
Okay!
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