A student in an empty classroom shouts, "Hello!" Which best explains what the student hears after the shout?
A B C D
an increased loudness of sound a reflection of sound an increased frequency of sound a refraction of sound
Question: A student in an empty classroom shouts, "Hello!" Which best explains what the student hears after the shout?
(A) an increased loudness of sound
(B) a reflection of sound
(C) an increased frequency of sound
(D) a refraction of sound

Answer: (B) a reflection of sound
Answer: (D) a refraction of sound
Question: A student in an empty classroom shouts, "Hello!" Which best explains what the student hears after the shout?
(A) an increased loudness of sound
(B) a reflection of sound
(C) an increased frequency of sound
(D) a refraction of sound
Answer: (B) a reflection of sound