Reflection of Sound

___________ affects how fast or slow sound waves travel. 

• Temperature
• Speed
• Amplitude
• Frequency 

What causes an echo?

• sound waves bouncing off large, hard surfaces

• sound waves bouncing off carpet

• sound waves bouncing off inside a cloth shop

• you repeating yourself

Tags

NGSS.MS-PS4-2

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

The farther away you are from a sound, the ___ the sound will be.

• softer
• louder
• higher
• lower

Tags

NGSS.MS-PS4-1

A sound reflection, in which sound bounces off of an object, is called an ___.

• eardrum
• echo
• refraction
• sound wave

Tags

NGSS.MS-PS4-2

_______________________ is a system that uses sound waves to determine locations of objects.

• GPS

• sonar

• ultrasound

• echolocation

Sound is a form of? 

• energy
• pitch
• volume

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

When Mr. Albbert yells his name in a cave, the sound reflects off the walls of the cave and travels back to his ears. What is this called?

• refraction

• amplitude

• pitch

• echo

Tags

NGSS.MS-PS4-2

An echo is when sound....

• bounces back to you off a surface

• goes under water

• travels through space

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sara and Maria made a telephone using two cups and a string. It was a very long string. Maria went upstairs in her house and Sara stayed downstairs. Maria spoke softly into the can. "I can hear you!" Sara said back. How can this happen?

• Sound waves travel through a vacuum.

• Sound waves travel through solids like the string.

• Sound waves travel from high to low.

• Maria talked so loudly that Sara could hear her without the phone.

Tags

NGSS.MS-PS4-2