11351800
Descrição
FlashCards por Claryss Ngai Ze Yan, atualizado more than 1 year ago
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Criado por Claryss Ngai Ze Yan
quase 9 anos atrás
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| Questão | Responda |
| how do we hear | sound wave inside our ears vibrate |
| Can we hear in outer space? | no because there are no partical in space |
| what is echo? | a reflection of sound |
| what is the unit of sound? | decible |
| what is a pitch? | a sound can be high or low, is referred to as a pitch |
| what is sound produce by? | it is produce by vibration |
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