SATS How To...
Welcome to the all new SATS How-to page. Here we will teach you valuble techniques that can be applied in your Maths, English & Science SATS exams, whatever the level. Forgotten how to convert a fraction? Unsure about how to plan an essay? Then the SATS How-to is for you!
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| How sound can be understood |
Physical Processes: Sound
Loudness
- A vibrating object can make a quiet sound or a loud sound.
- To make a louder sound from a drum, hit the skin harder.
- To make a louder sound from a string, pluck it with a greater force.
Pitch
- A vibrating object can be made to change pitch.
- If the length of a vibrating string is shortened then the pitch will rise (it will have a higher pitch).
- If the tension (amount it is stretched) in a vibrating drum skin is less, then the pitch will fall (it will have a lower pitch).
Materials and sound
- If there is a material such as gas, liquid or solid next to the vibrating object, the sound can travel.
- The sound travels through a material. The sound makes the material vibrate.
- Sound can travel very well in some solids, such as metal pipe, because the vibrations travel easily.
- We generally hear sounds because the air is carrying vibrations from objects to our ears.
- If there is no material between an object and our ears we cannot hear any sound. |
Music 
