A room with which type of surface will most likely produce an echo?(1 point)
Responses
A) glass
B) carpet
C) foam
D) dirt
A) glass
A builder wants to make a room soundproof in a new home. The builder should use materials that _____.(1 point)
Responses
A) absorb sound waves and create echoes
B) reflect sound waves and prevent echoes
C) reflect sound waves and create echoes
D) absorb sound waves and prevent echoes
D) absorb sound waves and prevent echoes
Waves Unit Test
7 of 147 of 14 Items
Question
A student puts a piece of black paper and a piece of white paper in the same sunny spot. After 30 minutes, she observes that the black paper feels warmer than the white paper. Which best explains the student’s observation?(1 point)
Responses
A)The black paper prevents waves from the sun from reaching the white paper.
B) The black paper absorbs more waves from the sun than the white paper.
C) The black paper receives stronger waves from the sun than the white paper.
D) The black paper reflects more waves from the sun than the white paper.
B) The black paper absorbs more waves from the sun than the white paper.
During a baseball game, the sound of the bat hitting the ball can be heard in most parts of the stadium. That sound is weaker at greater distances. What is the cause of this phenomenon?(1 point)
Responses
A) The sound waves slow down as they move away from the bat.
B) The sound waves are blocked by people in the stadium.
C) The sound waves are spread out over a large area.
D) The sound waves can only travel through certain materials.
C) The sound waves are spread out over a large area.
Which type of wave can travel through a vacuum?(1 point)
Responses
A) sound
B) seismic
C) light
D) mechanical
C) light
AM waves have a wavelength of approximately 100 meters. FM waves have a wavelength of approximately 1 meter. Which one has a higher frequency? Which one has higher energy?(1 point)
Responses
A) AM has a higher frequency, but FM is higher energy.
B) FM has a higher frequency and higher energy.
C) AM has a higher frequency and higher energy.
D) FM has a higher frequency, but AM is higher energy.