Question

a science lab team was questioning how best to describe sound energy. they generated the following reasoning.
amy: sound energy is a form of nuclear energy because you need atoms in order to produce sounds.
bentley: sound energy is a form of elastic energy because your vocal cords are muscles that flex.
charlie: sound energy is a form of chemical energy because you store the sound in your body.
dixie: sound energy is a form of mechanical energy because it uses vibrations, which are moving sound waves.

which person is correct?

○ amy
○ bentley
○ charlie
○ dixie

Explanation:

• Amy: Nuclear energy involves atomic nucleus changes (e.g., fission/fusion), sound doesn’t relate to this. So Amy is wrong.
• Bentley: Elastic energy is about objects stretching/compressing and returning, vocal cord flex isn’t the key to sound energy. So Bentley is wrong.
• Charlie: Chemical energy is from chemical reactions (e.g., fuel combustion), sound isn’t stored as chemical energy. So Charlie is wrong.
• Dixie: Mechanical energy involves motion/forces; sound is produced by vibrations (mechanical waves with motion), so sound is mechanical energy. Dixie is correct.

Answer:

Dixie