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Year 4 – Science - Sound

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Year 4 Science -SoundActivity 1 -Vibrations -Page 2Activity 2 How do we hear? -Page 8Activity 3 Loud and quiet sounds -Page 15Activity 4 -Pitch -Page 21Activity 5 Pitch Optional Challenge Page 30 Activity 6 -Quiz -Page 33What is Sound ?Discuss with your family or think about what you already know using the questions below as prompts. What is Sound ?Watch this clip to see to see how the different families of musical instrument create different do the musical instruments make sounds?Think of some words you could use to explain is Sound ?

Sound travels as a wave, vibrating the particles in the medium it is travelling in. So in our example, when she hit the drum, the drum skin vibrated. This made the air particles closest to the drum start to vibrate as well. The vibrations then passed to the ... C thunder D No sound.

  Sound, Thunder

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came again. Finally a new sound struck the ears of the men in the boat. It was the low thunder of waves beating the shore. “We’ll never be able to reach the lighthouse now,” said the captain. “Swing her a little more north, Billie.” “A little more north, sir,” said the oiler. So the little boat turned her nose once more down the ...

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Sound is a vibration – it needs something to pass on these vibrations (unlike light which can pass through a vacuum). Some materials allow sound pass through them very easily, especially hard rigid ones like metals. Other materials, especially soft ones like cotton wool, absorb sound. Ears are delicate and need to be looked after.

  Sound

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