Sound Energy

What causes sound?

• Matter, or an object, vibrating.
• This is an echo. When sound bounces off a flat, dense, surface it echoes.
• A sound wave with a lower frequency.
• The number of sound waves per second

Pitch

• How high or low a sound is
• An empty Vacuum
• A sound wave with a lower frequency.
• This is an echo. When sound bounces off a flat, dense, surface it echoes.

High Pitch

• This is an echo. When sound bounces off a flat, dense, surface it echoes.
• A sound wave with a higher frequency.
• An empty Vacuum
• A sound wave with a lower frequency.

Tags

NGSS.MS-PS4-2

Low Pitch

• Sound will travel best, or fastest, through this state of matter
• A sound wave with a lower frequency.
• This is an echo. When sound bounces off a flat, dense, surface it echoes.
• Sound will travel the worst, or slowest, through this state of matter

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Absorption of sound

• The number of sound waves per second
• When sound waves hit a soft, less dense, object the energy is absorbed.
• Matter, or an object, vibrating.
• A sound wave with a higher frequency.

Tags

NGSS.MS-PS4-2

Reflection of sound

• A sound wave with a lower frequency.
• Matter
• Sound will travel the worst, or slowest, through this state of matter
• This is an echo. When sound bounces off a flat, dense, surface it echoes.

Tags

NGSS.MS-PS4-2

Towels, soft materials, people, blankets, pillows

• Sound travels at a medium speed through this state of matter.
• The number of sound waves per second
• Matter
• Items of less density. These absorb sound energy.

Tags

NGSS.MS-PS4-2

Floors, walls, concrete, wood, hard plastic

• Items of more density. These objects reflect sound energy.
• The amount of stuff in a thing
• Matter, or an object, vibrating.
• Sound will travel best, or fastest, through this state of matter

Tags

NGSS.MS-PS4-2

Frequency

• The number of sound waves per second
• Matter
• The amount of stuff in a thing
• Sound will travel the worst, or slowest, through this state of matter

Tags

NGSS.MS-PS4-2

Density

• The amount of stuff in a thing
• Items of less density. These absorb sound energy.
• A sound wave with a higher frequency.
• The number of sound waves per second

Tags

NGSS.MS-PS3-4