Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What type of wave is a sound wave?
   • Sound waves are longitudinal waves.
2. Why does sound need a medium to travel?
   • Sound needs a medium of Particles to travel, as the Energy in sound waves is passed on by the collision of Particles.
3. In which of state of matter (solid, liquid, gas) does sound sound travel fastest?
   • Sound travels fastest in solids.
4. Why does the sound travel faster?
   • Sound travels fastest in solids as the Particles are closest together and so the collisions are passed on faster.
5. What happens when sound waves collide with an object such as an ear drum?
   • The sound Energy is absorbed by the ear drum.