Luis stretched a rubber band between his fingers. When he plucks the rubber band, it makes a sound. why does the rubber band make a sound when Luis plucks it?

• It vibrates the air.

• It heats the air

• It absorbs energy from the air

• It releases molecules into the air

Tags

NGSS.MS-PS4-1

Four students each have tuning forks that are different lengths. Below are their observations about each tuning fork. Which tuning fork would produce the highest pitch?

• Student 1's tuning fork

• Student 2's tuning fork

• Student 3's tuning fork

• Student 4's tuning fork

Tags

NGSS.MS-PS4-1

Which of these shows an object that produces energy by vibration?

• 
• 
• 
• 

Tags

NGSS.MS-PS4-1

Miss Clarke is showing her class how sound works. Which of the activities below would students be able to best see the vibrations caused by sound energy?

• playing the recorder

• Listening to music

• holding a tuning fork over water

• blowing a whistle

• playing the guitar

Tags

NGSS.MS-PS4-2

Students are doing an investigation about pitch using rubber bands. Below are their observations. Which rubber band created the lowest pitch?

• rubber band 1

• rubber band 2

• rubber band 3

• rubber band 4

Tags

NGSS.MS-PS4-1

True or False

We hear the dismissal bell at the end of the day because striking the bell causes the air around it to vibrate and sound to travel.

• True

• False

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which group has the best explanation of what causes sound and pitch?

• Group 1

• Group 2

• Group 3

• Group 4

A musician is playing a guitar. Below are the steps for how sound reaches our ears.

1. The vibrations travel through the air.

2. The vibrating air reaches our ears.

3. The guitar strings vibrate the air around it.

Which is the correct order of how sound reaches our ear?

• 1,2,3

• 3,2,1

• 3,1,2

• 1,3,2

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Students in Miss Clarke's class are learning about pitch by plucking a rubber band. What would produce the highest pitched sound?

• shooting the rubber band to another table in the room

• breaking the rubber band

• pulling the rubber band tightly and then plucking

• pulling the rubber band loosely and then plucking

Tags

NGSS.MS-PS4-1

Presley hits a drum with a drumstick and makes it vibrate. Then she rests her hand on the

drum and stops the vibration. What happens to the sound of the drum?

• The sound decreases in pitch because the vibrations have stopped.

• The sound stops because it cannot pass through her hand.

• The sound stops because the vibrations have stopped.

• The sound increases in pitch because the vibrations have stopped