2. A sound wave passes down the ear canal It hits the eardrum and makes it vibrate The vibration is passed on through some small bones into a liquid Nerve cells pick up the vibrations in the liquid and take the information to the brain as electrical signals Put these sentences in the correct order…

3. Add to your ‘dangerous sound’ diagram from yesterday that sounds made at 90 dB causes hearing damage.

4. Sound Write the title and date. Think of 3 ideas that may be related to the topic of ‘Sound’. 25 th February, 2010

5. Today we will: Recall that sound is a type of energy Investigate how vibrations and sounds are connected Learn what the terms Amplitude and Pitch mean

6. ……………… is a type of ……………… If something moves backwards and forwards fast, we say that it …………………. Vibrations can travel through ……………, …………… and ……………. Explain how the sound of a drum reaches your air. Use the word VIBRATIONS in your answer. Vibrates SoundSolid EnergyGas Liquid

7. Sounds travel as waves A vibration is passed along through a solid, liquid or gas as a wave. Experiment with the tuning fork: –Hit the fork on the bung –Lower it so that the tip is touching the surface of the water –Observe what happens to the water

8. Sound can NOT be heard in space (a vacuum). Explain why.

9. Whisper Football crowd Falling feather Aeroplane taking off Normal voice Music at a gig Stomach rumbling Ant walking Loud Quiet Large Amplitude Small Amplitude

10. Referee’s whistle Mouse squeak Man’s voice Woman’s voice Lion’s roar Double bass Violin High pitch Low pitch