Sound Quiz

Look at the pictures of the instruments below. Which of the following instruments produces sound by vibrating air inside it when it is used?

1. Piano
2. Bell
3. Flute
4. Guitar

Answer: (c) Flute

You are outside with your friend. You hear thunder after seeing lightning. Why does this happen?

1. The delay is because the sound of thunder is weaker than lightning.
2. Sound travels slower than light through the air.
3. Thunder is created when lightning hits the ground.
4. Sound travels faster than light but starts later.

Answer: (b) Sound travels slower than light through the air.

A person is standing in front of a large empty building and claps their hands. State which of the following statements is true for this situation. 1. The sound will bounce off the building and come back to the person as an echo. 2. The sound will disappear completely when it hits the building. 3. The sound will be absorbed by the building and not be heard again.

1. 1-True, 2-True, 3-False
2. 1-True, 2-False, 3-False
3. 1-False, 2-True, 3-False
4. 1-False, 2-False, 3-True

Answer: (b) 1-True, 2-False, 3-False

If you place a ringing phone inside a sealed glass jar, what will happen to the sound as you remove the air?

1. The sound will get louder.
2. The sound will stay the same.
3. The sound will become softer.
4. The sound will turn into an echo.

Answer: (c) The sound will become softer.

The teacher asked four students to identify actions that can help reduce sound pollution. Who took the correct step towards reducing sound pollution? Sarah: Avoid playing loud music near residential areas. Tom: Use soundproof materials in buildings. Lily: Make noise in public places without considering others. Mark: Drive faster to reduce the noise from the engine.

1. Sarah and Tom
2. Sarah and Lily
3. Tom and Mark
4. Sarah and Mark

Answer: (a) Sarah and Tom

After striking the metal spoon, wooden block, and plastic cup, which of the following statements is true about the sounds produced?

1. The metal spoon makes a softer sound than the wooden block.
2. The plastic cup makes a louder sound than the metal spoon.
3. The wooden block makes a quieter sound than the plastic cup.
4. The metal spoon makes a louder sound than the wooden block.

Answer: (d) The metal spoon makes a louder sound than the wooden block.

Tom noticed that his voice sounds different when he talks inside a tunnel compared to when he talks in an open park. What could explain this difference?

1. Tunnels make sound waves travel in straight lines only.
2. Sound waves in tunnels reflect off the walls, creating an echo.
3. Sound travels faster in tunnels because of the absence of wind.
4. Talking inside tunnels produces light waves along with sound waves.

Answer: (b) Sound waves in tunnels reflect off the walls, creating an echo.

Study the given flow chart. Where would a loudspeaker be placed?

1. Q
2. P
3. R and Q
4. R

Answer: (d) R

You are at a concert, and you hear the loud sound of drums. Later, you hear a soft sound of a flute. Which of the following explains why the drum sound is loud while the flute sound is soft?

1. The drum vibrates less than the flute.
2. The drum vibrates more than the flute, producing a louder sound.
3. The flute makes no sound when played.
4. The flute’s sound is always louder than any drum sound.

Answer: (b) The drum vibrates more than the flute, producing a louder sound.

A triangle instrument is struck with a metal stick and produces a clear, ringing sound. What makes the sound?

1. The triangle vibrates when hit.
2. The air around the triangle stops moving.
3. The stick creates the sound on its own.
4. The sound is made by light waves.

Answer: (a) The triangle vibrates when hit.