EVS 3_Chapter 13_Light, Sound and Force

Which one has a soft sound?

• 
• 
• 

Sounds are produced when an object ____.

• stuck

• stops

• vibrates

Which of the following set of words are examples of pleasant sound?

• guitar and violin

• ambulance and firetruck

• airplane and helicopter

Mary picks up her flute during a school concert and plays a melody of Mary had a little lamb. Everyone stood up and applauded her. That means Mary just produced _______.

• a pleasant sound

• an unpleasant sound

• a horrible sound

Nina cannot hear properly since the last week. She had been to the street where some people were shouting in loudspeakers. What can her cause be ?

• Soft Sound

• Pleasant Sound

• Noise Pollution

Things that give us light are called _______________.

• luminous

• non-luminous

• none of these

A push or pull applied on a body is called _____.

• work

• force

• noise

We can see things with the help of __________________.

• light

• air

• lens

Sun is a ______________ object.

• non-luminous

• luminous

• opaque

When an object blocks the path of light, a_____________ is formed.

• sound

• shadow

• cloud