Sound🔊 Flashcards
1
Q
Sound is produced by
A
Vibrations (vocal cords,air molecules,ear drum)
2
Q
Sound can travel through a
A
Medium e.g. Solid,a liquid or a gas
3
Q
Sound cannot travel through a
A
Vacuum (no air) therefore it needs a medium to travel through
4
Q
Sound
A
A form of energy
5
Q
The speed of sound in air
A
Is 340m/s ,light is 300,000,000 m/s
6
Q
An echo
A
Is a reflection of sound
7
Q
Ultrasound
A
Is sound above our level of hearing
