What type of materials REFLECT sound?

• hard materials
• smooth materials
• both hard and smooth materials
• gas

Tags

NGSS.MS-PS4-2

Destiny hits a symbol with her drumstick and makes it vibrate.  She then puts her hand on the symbol and stops the vibration.  What happened to the sound of the symbol? 

• The sound continues but not as loud. 
• The sound continues but has a lower pitch. 
• The sound stops because her hand absorbs the sound. 
• The sound stops because the vibrations have stopped. 

Tags

NGSS.MS-PS4-2

The ___________________ is how loud or soft a sound is. 

• echo
• frequency
• pitch
• volume

Tags

NGSS.MS-PS4-1

Why is the school library covered with carpet?

• So everyone can make a lot of noise
• to help absorb sounds to keep it quiet
• because it looks good
• to help absorb sounds so it can stay noisy

If you walk into an empty gym and yell, why would you hear an echo?

• The gym walls are soft and uneven. 
• The sound waves are being absorbed by the hard smooth walls.
• The sound waves are bouncing off the hard smooth gym walls.
• The gym walls are really clean.

Tags

NGSS.MS-PS4-2

What is vibration?

• how loud a sound is
• the back and forth movement of matter
• how high or low a sound is
• the loudness or softness of a sound

Tags

NGSS.MS-PS4-1

Sound is a form of? 

• energy
• pitch
• volume

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sound is caused by....

• molecules
• vibrations
• people
• space

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What matter does sound travel the fastest in? 

• Solid
• Liquid
• Gas
• Space

Tags

NGSS.MS-PS4-2

In what direction does sound travel?

• Straight 
• ZigZag
• All Directions 
• Diagonal