2019 Form 2 Science Chapter 10: Sound Waves

Sound is an __________.

• source

• energy

Sound is not formed by vibration.

• true

• false

Sound requires a medium to propagate.

• true

• false

Sound can propagate through vacuum.

• true

• false

Sound is transferred _______ in liquid.

• very rapidly

• rapidly

• slowly

• very slowly

Sound is transferred __________ in gas.

• very rapidly

• rapidly

• slowly

• very slowly

Sound cannot be absorbed.

• true

• false

__________ and ___________ surface表面 reflects反射 sound.

• hard, rough

• hard, smooth

• soft, smooth

• soft, rough

__________ and ___________ surface absorbs吸收 sound.

• hard, smooth

• hard, rough

• soft, smooth

• soft, rough

tick the source of vibration that produce sound.

• speaker

• table

• wind

• fans

• mechanical pencil