Pan Pan hits a drum with a drumstick and makes it vibrate. He rests his hand on the drum and stops the vibration. What happened to the sound of the drum?

• The sound stops because it cannot pass through his hand.

• The sound decreases in pitch because the vibrations have stopped.

• The sound becomes clearer because the vibrations have stopped.

• The sound stops because the vibrations have stopped.

How could you increase the loudness of a sound produced by an object?

• Hit the object harder.

• Hold the object tightly.

• Hit the object softer.

• Do not do anything to the object.

The greater the energy is exerted, the ______ the sound is produced.

• softer

• louder

• longer

• shorter

Mei Mei conducted an experiment where she hit a drum with a drumstick and a paperclip flew through the air off the drum. Which of the following statements best describes what Michelle demonstrated with her experiment?

• Vibrating objects make a sound.

• Vibrating objects do not change their pitch and loudness.

• The movement does not require energy.

• Sound energy can change into electric energy.

What is sound?

• Sound is a matter

• Sound is both matter and energy

• Sound is an energy

• Sound is not an energy

Which of the following medium where sound travels the fastest?

• Solid

• Liquid

• Gas

Which part of our body vibrates and creates sound?

• nose

• vocal cords

• eyes

• ears

True or False: Sound doesn't need a medium to travel.

• True

• False

The ruler __________ that is why it can create a sound.

• jumps

• vibrates

• sings

• cries

Pooh is playing a song on the guitar. How will the sound change if he plucks the string with more force?

• the pitch will get higher

• the volume will get louder

• the pitch will get lower

• the volume will get softer