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ENERGY (SOUND (speaker, microphone, headphones, earbuds, radio),…
ENERGY
SOUND
speaker
microphone
headphones
earbuds
radio
MECHANICAL
swimming fish in the water
person talking (lips moving)
a moving airplane in the sky
a kid climbing a tree
race car racing around the track
LIGHT
working light bulb
flashlight
burning candle
lamp
phone screen
SOLAR
the sun
earths core
fire/candle
solar panels
THERMAL
ELECTRICAL