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Science- sound
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- 1SOUNDProduced when objects vibrate
- 2SOUND IS AForm of energy
- 3EXAMPLES OF VIBRATIONS1.When you pluck a guitar string
2.When you put paint on a speaker the paint bounces up and down
3. When you put a ruler on the end of a table and move it you can hear the vibrations - 4TO DEMONSTRATE THAT SOUND IS A FORM OF ENERGYSuspend a tennis ball by a string and play a speaker beside it the ball is seen to move away from the speaker.
- 5HOW SOUND TRAVELS-Emma's vocal chords will vibrate
-The air molecules in Emma's mouth will vibrate
-When Emma opens her mouth the vibration energy is passed onto the air molecules in the room.The air molecules in the room are vibrating.
-The air molecules in Naomi's ear canal will vibrate and knock against her ear drum.
-The energy falling on Naomi's eardrum allows her to hear Emma's voice. - 6REFLECTION OF SOUNDAn echo is an example of sound reflection
- 7SPEED OF SOUND AND LIGHTYou see lightning before you hear thunder.
- 8DADS SILLY TRIANGLEDISTANCE
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SPEED X TIME - 9DECIBELSSound is measured in decibels
The human ear cannot hear over 120 decibels - 10WHAT DOES SOUND NEED TO TRAVEL?a medium
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- Fichas sobre Science- sound, creado por lynngaffney el 25/03/2015.
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- lynngaffney
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