Waves 8

How does sound transfer energy?

• By vibrating particles

• By travelling through air

• By air moving along with the wave

Which pictures show a longitudinal wave?

• 
• 
• 
• 

Where is the pressure greatest in a longitudinal wave?

• Peak

• Trough

• Compression

• Rarefaction

Which statements are true of 'ultrasound'.

• Above 20 000Hz

• Under 20 000Hz

• Makes liquid particles vibrate

• It can only be heard by children (not adults)

Which is the correct order of the electromagnetic spectrum?

• microwaves

  infrared

  x-rays

  gamma rays

• infrared

  visible light

  microwaves

  ultraviolet

• visible light

  microwaves

  ultraviolet

  x-rays

• radio waves

  gamma rays

  infrared

  ultraviolet

High energy waves knock electrons out of atoms in living cells.

What is this called?

• ionisation

• superpose

• transmission

• reflection

• oscillation

Waves join together by adding up or cancelling out.

What is this called?

• ionisation

• superpose

• transmission

• reflection

• oscillation

What happens when a wavefront hits a barrier?

• ionisation

• superpose

• transmission

• reflection

• oscillation

How does a transverse wave relate to the sound wave?

• It runs parallel

• It is perpendicular

Which statements are true of ultrasound?

• High frequency sound waves

• Low frequency sound waves

• They make solid and liquid particles vibrate

• It is used for underwater navigation