Lesson 2 — 5.1 Sound, vibrations, and energy transfer

• Sound
• Basisschool
• Groep 2

Period 2

Sound

This lesson

• What is a sound wave?
  
• Medium – The speed of sound in different mediums
  
• Compression & refraction
  
• Longitudinal and transverse waves
  

Learning goals

• What are sound waves?

• What are longitudinal and transverse waves?

• What is compression and rarefaction?
  

• What is a medium?

• Name the speed of sound in several materials.
  

What is sound?

Sound is a vibration that propagates as an acoustic wave

A sound wave simulation

Link

Transverse

Transverse

Longitudinal

Compression & rarefaction

Note

Two types of waves:

• Longitudinal waves
  
• Transverse waves
  

Sound waves are longitudinal waves.

Transverse waves have two phases:

• Compression
  
• Rarefraction
  

Where do you the compression and rarefaction?

Where do you the compression and rarefaction?

Compression

Where do you the compression and rarefaction?

Compression

Rarefaction

Sound waves require a medium

• Air
  
• Water
  
• Metal
  

Link

Sound waves require a medium

• Air (gas)
  
• Water (liquid)
  
• Metal (solid)
  

Link

Sound waves require a medium

• Air (gas) — 343 m/s
  
• Water (liquid) — 1500 m/s
  
• Metal (solid) — 5100 m/s
  

Link

Learning goals

• What are sound waves?

• What are longitudinal and transverse waves?

• What is compression and rarefaction?
  

• What is a medium?

• Name the speed of sound in several materials.