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Sound and Light Lesson Exam
5 A Science / Module 5
3. Which statements correctly describe sound? (Select all that apply.)
Sound waves behave in predictable ways.
All sound requires a medium through which to travel.
All sound can be heard by human ears.
Sound waves are compression waves that transfer energy in molecules.

stupid i wont let you get a chance

explanation:

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.