SOUND_GRADE 3

1. Sound is caused by? 

• 1. Pitch

• 1. Waves

• 1. Vibrations

• Light

Sound travels in all directions and _______ path.

• 1. Straight 

• 1. Zigzag

• Curve

• Broken

Which of the following scenarios best explains why you can hear your friend talking through a wall but not see them?

• 1. Sound travels faster than light.

• 1. Walls absorb light but not sound.

• 1. Sound waves can bend around obstacles.

• 1. Light waves are too weak to pass through walls.

What do you call the highness and lowness of the sound? 

• 1. Pitch

• Timbre

• Volume

• Intensity

In which medium does sound travel the fastest? 

• air

• vacuum

• solid

• liquid

Which of the following is an example of a high-pitched sound?

• 1. thunder

• 1. drum

• 1. whistle

• 1. car engine

How do you practice wise and safe use of sound in daily life?  

• 1. Shout near the ears of your classmate. 

• 1. Do not cover your ears with your hands if you hear a noise. 

• 1. Shout loud in quiet places like libraries or classrooms.

• 1. Lower the volume when listening to music or watching television.