Sience

Sound is produced by the ... of objects

• air

• artificial

• Noise

• vibrations

When we blow a trumpet, the column of ... in it vibrates and gives out sound.

• air

• artificial

• Noise

• vibrations

Sound travels in ......directions.

• air

• artificial

• All

• vibrations

Our ... vibrate when we talk and sing.

• vocal cords

• artificial

• Noise

• vibrations

The waves at the beach and the crowing of a rooster give out sounds. They are the ... sources of sound.

• Natural

• artificial

• Noise

• vibrations

Exploding firecrackers and moving vehicles are the ... sources of sound.

• Natural

• artificial

• Noise

• vibrations

...... is unpleasant sound

• Natural

• artificial

• Noise

• vibrations