4th Grade Sound

The vocal chords of a lion vibrate at a slower rate when it roars. What BEST describes the pitch of the lion's roar?

• High Pitch

• Low Pitch

• Soft Pitch

• Hard Pitch

Jared has a small bell that is easy to move when struck with a hammer. Lydia has a large bell that is hard to move when struck with a hammer. What is MOST LIKELY true?

• The small bell will be louder.

• The large bell will be louder.

• The small bell will have a higher pitch.

• The large bell will have a higher pitch.

Haley is doing an experiment for her science class. She is trying to find out which objects will produce the loudest sound when she knocks on them. Which of the following would be the LEAST LIKELY to produce a loud sound?

• a piece of glass

• a piece of cotton

• a piece of wood

• a piece of metal

Which of the following is required for sound?

• chemicals

• vibrations

• water

• instruments

The school bell is a metal bell with a metal clapper inside. When it rings, it is very high pitched. If the school wants to decrease the pitch of the bell, what should they do?

• set the clapper to hit the bell with greater speed

• set the clapper to hit the bell with greater force

• set the clapper to hit the bell with less speed

• set the clapper to hit the bell with less force

Tony plucks two strings on a guitar. He sees one string is vibrating much faster than the other. What is MOST LIKELY true?

• The string is vibrating faster produces a lower pitch.

• The string vibrating faster produces a higher pitch.

• The string vibrating slower produces a louder sound.

• The string vibrating slower does not produce any sound.

The barn on Maggie's farm has a tin roof. Whenever it rains, it is very loud in the barn. What MOST LIKELY causes so much noise in the barn when it rains?

• rain rusting the metal roof

• rain vibrating the metal roof

• lightning shaking the metal roof

• lightning reflecting the metal roof

Which of the following would be MOST LIKELY to create a low pitch?

• A bird chirping with tight vocal chords

• Blowing air through a whistle very fast

• Slow vibrations moving through a tree as a woodpecker knocks on it

• Quick vibrations moving through a metal pole when a chain hits it

The conductor of an orchestra is conducting a piece of music. When the sound travels through the air to the audience, the air particles

• vibrate in place and stay stationary

• vibrate but not in any fixed direction

• vibrate along the direction of wave propagation

• vibrate perpendicular to the direction of wave propagation

What happens when a rubber band is stretched tight and plucked with a finger?

• It makes a sound, creating vibration

• It vibrates, creating a sound

• It creates heat, causing vibration

• It reflects light, causing sound