waves pt2

Sound is caused by....

• molecules
• vibrations
• people
• space

Tags

NGSS.MS-PS4-1

Sound is caused by? 

• force
• vibrations
• instruments

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

Tags

NGSS.MS-PS4-1

An object that does not vibrate cannot produce

• sound
• light
• heat
• electricity

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sound is a form of? 

• energy
• pitch
• volume

Tags

NGSS.MS-PS4-1

This is the unit used to measure the volume of a sound. 

• Decibel
• Medium
• Vibration
• Oscilloscope

This is what you get when soundwaves are reflected, or bounce back, off of a hard surface.

• Amplitude
• Pitch
• Volume
• Echo

Why does cupping your hands around your mouth when you shout make the sound travel further?

• The sound spreads out.
• Your voice gets louder.
• You are screaming.
• The sound energy is directed in one direction.

When light bends it is ______

• Reflection
• Absorption
• refraction 
• optical density

Tags

NGSS.MS-PS4-2

When light bounces back it is _____

• Reflected
• Refracted
• Absorbed
• Optical Density

Tags

NGSS.MS-PS4-2