Sound Primary 4

State the ways of producing sounds based on the pictures below.

• Bowing

• Clapping

• Plucking

• Blowing

State the ways of producing sounds based on the pictures below.

• Bowing

• Knocking

• Clapping

• Plucking

State the ways of producing sounds based on the pictures below.

• Bowing

• Clapping

• Knocking

• Plucking

Vibrations produce ____.

• sound

• music

• voice

• loud

Based on the diagram, give your inference.

• The siren of the ambulance indicates an emergency alert.

• The siren of the ambulance makes the student suprise .

Siva and his family visited Niah Cave. As soon as they arrived, Siva shouted in the cave. What is the resulting phenomenon?

• echo

• sonar

• solar

• radar

Mei Lan loves to listen to music. However, she is disturbed by the loud music coming from her neighbour’s house.

Based on the statement, which explain the effects of the sound? Answer more than one.

• Sound helps to communicate

• Sound is entertaining.

• Sound provides alertness.

• Sound causes disturbance.

Sound pollution can cause ....

(Answer more than one)

• hearing problem

• disturbance

• emergency alert

• notification

Choose two ways to reduce sound pollution.

• use ear protectors

• use sound absorbers

• turn off the sound

• none of above

Which of the following is a useful sound?

• sound of aircraft engine

• sound from construction work

• sound of alarm

• sound of vehicles