Sound Energy Review

Mrs. Hanson fills five glasses with different amounts of water. She lightly taps each glass, and sound is made by the vibrations. The rate of vibration of each glass varies depending on the amount of water in the glass. ​ ​Which property of the sound varies from glass to glass?​

• the pitch of the sound

• the echo of the sound

• the loudness of the sound

• the speed of the sound

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

The table below shows how fast sound travels in different kinds of matter. ​

​ ​According to the table, sound travels fastest through

• gases

• liquids

• solids

Tags

NGSS.MS-PS4-2

A student placed a plastic ruler on a table so that part of the ruler stuck out from the table’s edge. Which positioning of the ruler in the four examples above would probably produce the highest sound?

• Example 1

• Example 2

• Example 3

• Example 4

Tags

NGSS.MS-PS3-5

NGSS.MS-PS4-1

Students observe that the sound of their voices echoes in an empty classroom. They fill the room with soft objects like coats and backpacks and notice that the sounds of their voices change. How will the sound of their voices change if the room is filled with soft objects?​

• The sound will combine

• The sound will become quieter

• The sounds will travel more slowly

• The sounds will have a higher pitch

Tags

NGSS.MS-PS4-2

Why do the sounds of the students' voices change after the classroom is filled with soft objects?

• The objects allow sound vibrations to pass through them.

• The objects allow sound vibrations to pass through them.

• The objects absorb the sound vibrations that reach them.

• The objects move when the sound vibrations reach them.

Tags

NGSS.MS-PS4-2

Ms. Bauer makes a model guitar by using an open box for the guitar body and rubber bands for the strings. Students observe that the pitch of the sound produced by each rubber band depends on how tight the rubber band is.

​ ​

Based on your understanding of pitch, what is a possible reason that the tightness of a rubber band can change the pitch of sound?

• It makes the rubber band vibrate faster or slower.

• It makes the rubber band vibrate in different directions.

• It makes the rubber band vibrate more loudly or softly.

• It makes the rubber band vibrate for different lengths of time.

Tags

NGSS.MS-PS4-1

Sophia shouts down a well and hears an echo. What causes the echo?

• Sound is absorbed at a surface.

• Sound is reflected from a surface.

• The frequency of sound vibrations increases.

• The frequency of sound vibrations decreases.

Tags

NGSS.MS-PS4-2

What is necessary for sound to travel from a radio to your ears?

• Air

• Water

• Metal

• Particles to vibrate

Tags

NGSS.MS-PS4-2

What must change in order for the pitch of a sound to change?

• Frequency

• Amplitude

• Reflection

• Absorption

The highest sound people can hear have frequencies of about 20,000 vibrations per second. Dogs can hear higher frequencies than humans can hear. You see a dog trainer put a whistle in his mouth and blow, but you don’t hear anything. Then a dog comes running. What can you infer about the whistle?

• The whistle is broken.

• The whistle must produce a sound higher than 20,000 vibrations per second.

• The whistle must produce a sound lower than 20,000 vibrations per second.

• The dog doesn't like the whistle.