A guitar string is tightened and plucked with the same strength as before. What sound change should the player expect?

A student taps the same drum gently, then taps it much harder without changing the drum. What changes most in the sound?

A recorder has more holes covered, making the vibrating air column longer. How does that usually affect the sound?

Two tuning forks are the same material, but one has shorter prongs. When struck the same way, what sound should the shorter-pronged fork make?

A whistle is blown softly, then blown harder while its opening and shape stay the same. What is the best comparison of the two sounds?

A xylophone has a short bar and a long bar made from the same material. If both are struck equally, what sound does the short bar usually make?

A speaker cone moves back and forth at the same rate but moves farther each time. What change would a listener notice?

A bell rings inside a glass jar filled with air, and students hear it clearly. The air is removed, but the bell still moves. Why is the sound much quieter?

An astronaut sees a tool hit a metal rail outside a spacecraft in empty space. Why would the astronaut not hear the hit directly through space?

A swimmer underwater hears two stones click together nearby. What medium carries the sound from the stones to the swimmer's ears?

A student puts one ear on a wooden desk while another student taps the far end. The tap sounds clear. What carried much of the sound?

Two paper cups are joined by a tight string. One student speaks into a cup, and another hears the voice through the other cup. What mainly transmits the sound between cups?

A radio plays inside a sealed glass jar. After the air is pumped out, students can still see the radio clearly but can barely hear it. What does this show?

A singer holds one hand on the front of the throat while humming and feels a buzz. What is vibrating to start the sound?

A drum is struck, and people nearby hear a boom. What part of the drum first vibrates to make the sound?

A tuning fork is struck and then held near the ear without touching it. What reaches the ear through the air?

A small speaker plays a note while its paper cone moves in and out quickly. What is the sound source doing?

A bee buzzes near a flower, and a student hears the buzz. What vibrating part starts the sound?

A classmate claps across the room. The sound reaches your ear, but the room's air does not all move across to you. What actually travels?

A rubber band is stretched over a box and plucked, making a twang. What begins the sound that travels to the ear?