Sound Motion Speed

During science class, Amaro was investigating how tuning forks worked. He would strike the tuning fork with a mallet. When he did this, Amaro could hear a high-pitched ringing sound. Amaro noticed that after he struck the tuning fork with the mallet, it would ring, but if he squeezed the ringing tuning fork with his hand, the sound would immediately stop. Why did the ringing fork stop when Amaro squeezed it with his hand?

• Squeezing the tuning fork made it vibrate so fast it is impossible to hear.

• Squeezing the tuning fork hurt the tuning fork, so it stopped making a sound.

• Squeezing the tuning fork stopped it from vibrating.

• Squeezing the turning fork did not stop the sound, he was not listening carefully enough.

Why did the tuning fork stop when Amaro squeezed it with his hand?

• Squeezing the tuning fork made it vibrate so fast it is impossible to hear.

• Squeezing the tuning fork hurt the tuning fork, so it stopped making a sound.

• Squeezing the tuning fork stopped it from vibrating.

• Squeezing the tuning fork did not stop the sound, he was not listening carefully enough.

The pictures below show a boy and a girl playing musical instruments. The boy’s flute makes a higher-pitched sound than the girl’s guitar. Which reasoning BEST describes why this might happen?

• The guitar has a higher frequency than the flute.

• The flute makes a louder sound than the guitar.

• The flute’s parts vibrate, but the guitar’s parts do not.

• The flute’s parts vibrate more quickly than the guitar’s parts.

The pictures below show a boy and a girl playing musical instruments. The boy’s flute makes a higher-pitched sound than the girl’s guitar. Which reasoning BEST describes why this might happen?

• The guitar has a higher frequency than the flute.

• The flute makes a louder sound than the guitar.

• The flute’s parts vibrate, but the guitar’s parts do not.

• The flute’s parts vibrate more quickly than the guitar’s parts.

Which pipe has the lowest pitch?

• Pipe A

• Pipe B

• Pipe C

• Pipe D

Below is a picture of a pipe organ, which is a combination of a piano and a whistle. Each key on the organ pushes air through the pipes. Depending on the length of the pipe, a different pitch sound is made.

• Pipe A

• Pipe B

• Pipe C

• Pipe D

A scientist was making recordings of different animals in the Florida Everglades. The scientist forgot to label the recordings. Below are pictures of the animals and the sound waves they made. Match them to the correct animal. (Each sound wave lasts for 1 second) Sound 1: Which animal made this sound wave?

• Mouse

• Bear

• Owl

A scientist was making recordings of different animals in the Florida Everglades. The scientist forgot to label the recordings. Below are pictures of the animals and the sound waves they made. Match them to the correct animal. (Each sound wave lasts for 1 second) Sound 2: Which animal made this sound wave?

• Mouse

• Bear

• Owl

A scientist was making recordings of different animals in the Florida Everglades. The scientist forgot to label the recordings. Below are pictures of the animals and the sound waves they made. Match them to the correct animal. (Each sound wave lasts for 1 second) Sound 3: Which animal made this sound wave?

• Mouse

• Bear

• Owl

A scientist was making recordings of different animals in the Florida Everglades. The scientist forgot to label the recordings. Below are pictures of the animals and the sound waves they made. Match them to the correct animal. (Each sound wave lasts for 1 second) Sound 1: [Image of sound wave]

• Mouse

• Bear

• Owl