Learning about Pitch with Rubber Band and Markers

Ginny and Marshall are using a rubber band, 2 markers, and a box to learn about pitch. First, they stretch a rubber band around a box. Next, they place markers under the rubber band. They can move these markers to make the section of the rubber band that’s being plucked shorter and longer. Marshall makes a sound by placing the markers as seen in the picture below. He plucks the rubber band with his finger. Ginny wants to make a higher pitch sound than the one that Marshall made. Which picture shows how she should place the markers so that when she plucks the rubber band, it will result in a higher pitch?

• Image showing one placement of markers on the rubber band.

• Image showing a different placement of markers on the rubber band.

Ethan is investigating how to produce a sound. He taps a metal fork with a metal spoon. What will most likely happen?

• The fork vibrates and makes a sound

• The fork does not vibrate or make a sound

• The fork vibrates but does not make a sound

• The fork does not vibrate but does make a sound

Fourth grade students all created different ways to investigate sound. Group 1 wrapped rubber bands around a shoe box. Group 2 hung a ruler off the edge of a desk. Which of the following will both groups encounter when producing sound?

• Only group 1 will hear sound because rubber bands are used to create vibrations when pulled on

• Both groups will move an object that will create a response with a sound and vibrating objects

• Only group 2 will hear sound because the ruler will vibrate and create a sound

• Both groups will hear a sound, but only group 1 will observe vibrations

What will happen when the student taps the glasses?

• All of the glasses of water will produce different sounds, but there is no way of knowing what type of sound they will make until you hit all the glasses and make observations.

• The glass with the most water will have the lowest pitch sound since vibrations slow down to travel through the most water.

• All glasses of water will produce the same sound since the vibrations are traveling through the same type of liquid.

• The glass with the least water will have the lowest pitch sound since there is less water for the sound to travel through.

Which student conducted an investigation that had the lowest pitch sound?

• Student 1: All of the glasses of water will produce different sounds, but there is no way of knowing what type of sound they will make until you hit all the glasses and make observations

• Student 2: The glass with the most water will have the lowest pitch sound since vibrations slow down to travel through the most water

• Student 3: All glasses of water will produce the same sound since the vibrations are traveling through the same type of liquid.

• Student 4:The glass with the least water will have the lowest pitch sound since there is less water for the sound to travel throughent 4

Liz is working on her plan to create a device that will use sound waves to communicate yes or no answers to her friend's questions. She fills two glass bottles with the same amount of water. The picture shows her device. She will tap each of the bottles once with a spoon to create two different sounds. One bottle will produce a high pitch sound when tapped with the spoon, and the other bottle will make a low pitch sound. She explains to her friend that the lower pitch means 'no' and the higher pitch means 'yes.' Will her device be able to communicate the yes or no messages using different pitches?

• Yes, she will be able to create different pitches of sound because both bottles are filled with water all the way to the top.

• Yes, she will be able to create different pitches of sound if she hits one bottle lightly and the other bottle very hard.

• No, she will not be able to produce any sound at all because the jars are filled with water.

• No, she will not be able to produce different pitches. Both bottles will have the same pitch when tapped with the spoon because the water levels are the same.

Adam is playing outside. He wants his brother to come outside and play with him. Adam bangs on his drum to signal his brother inside the house. What did Adam's device use to communicate information?

• Wind

• Heat

• Light

• Sound

Students are going camping and are creating a signal sound to use whenever they want their friends to come find them. Which of the following can the students do?

• The students should use mirrors to reflect light across the campsite.

• The students should create a campfire to send smoke signals.

• The students should use flashlights and point them at the sky.

• The students should use whistles made out of clay.

The following students made devices to communicate with friends across the room:

• Only students 1 and 2 created a device to communicate with sound.

• They are all created in order to speak to one person to another.

• They will all produce vibrations, which will result in a sound.

• They are all created in order to communicate with light.

Students were tasked with creating devices to communicate with either light or sound using common materials:

• Student 1 is successful in communicating using common materials by using light.

• Student 2 is successful in communicating using common materials by using sound.