Ch 12- Sound

What is frequency?

• the number of vibrations per second

• how high or low a sound is

• the loudness or softness of a sound

• the back and forth movement of matter

Measure of how high or low a sound is

• amplitude
• compression
• speed of sound
• pitch

Tags

NGSS.4-PS4-1

A longer string makes a _______ pitch than a short string.

• louder
• softer
• higher
• lower

Tags

NGSS.4-PS4-1

Sound is a form of? 

• energy
• pitch
• volume

Tags

NGSS.4-PS3-2

Vibrating vocal chords causes sound energy when a person speaks.

• True
• False

Tags

NGSS.4-PS4-1

NGSS.4-PS3-2

The ___________________ is how loud or soft a sound is.

• echo

• frequency

• pitch

• intensity

Which of the following determines the pitch of a sound wave?

• frequency
• density
• mass
• reflection

Tags

NGSS.4-PS4-1

Library are quiet places. Why is do they use carpet on the floor?

• So everyone can make a lot of noise

• to help absorb sounds waves and keep them from reflecting or traveling further

• 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.4-PS4-1

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.4-PS4-1