The figure compares a ringing bell in air with the same bell in a pumped-out jar. The observer sees both clappers move but hears only one. What does this establish?

In the figure, a lamp and a buzzer operate in two chambers, but the buzzer is heard only when air is present. What is the best conclusion?

A comparison figure shows sunlight visible outside a spacecraft but a shout outside the window is not heard until air fills the cabin. What does the comparison show?

The figure contrasts a radio signal received by a spacecraft through empty space with a spinning fan in a vacuum that makes no audible sound. What does it establish?

In the figure, a laser dot is visible through an evacuated jar, but a vibrating tuning fork inside the jar is not heard. What is the comparison testing?

A phone receives a signal in both chambers, but a bell is heard only in the chamber with air. Which explanation fits the figure?

A satellite TV dish receives a signal from a spacecraft across near-empty space. Which named wave could carry that signal?

A crest moves across the surface of a lake after a stone drops into the water. How should that wave be classified?

An earthquake P wave travels through rock inside Earth. Which classification is correct?

A dentist's X-ray image is made using waves that pass through air and low-pressure regions before reaching a detector. What type of wave is an X-ray?

A medical probe sends ultrasound into tissue using coupling gel. How should ultrasound be classified?

A red laser beam crosses an evacuated tube in a lab. Which classification fits the laser light?

A stadium's wireless network sends data to a phone using radio-frequency waves. What kind of wave carries the data?

A compression pulse moves down a stretched slinky on the floor. Which classification is correct?

Gamma rays from a distant supernova reach telescopes after crossing interstellar space. What type of wave are gamma rays?

A seismic S wave shakes rock sideways as it travels through Earth's crust. Which statement classifies it correctly?

An infrared remote sends a signal from a controller to a television. How is the infrared wave classified?

Ripples spread across a pond after a duck lands. What do the ripples carry outward across the pond?

In a movie, an explosion in deep space makes a loud boom heard by a nearby spacecraft with no contact between them. Why is this impossible?

Two astronauts outside a spacecraft try to shout to each other through their helmet visors without radios. What is wrong with the plan?

A story says a microphone on the Moon hears a meteor explode above the surface before any debris hits. Which error is being made?

A speaker cone vibrates inside a vacuum chamber, but a student says the sound should still spread because the cone is moving. What is missing?

A student says a radio wave from a probe is just sound traveling through space because the receiver makes a voice. What diagnosis is correct?

In empty interplanetary space, the crew of a spaceship can hear their own engine hum. How does that sound reach their ears?

An untethered robot taps a metal plate, and a second robot across an empty vacuum gap is supposed to hear the tapping as sound. What is the flaw?

Someone claims starlight reaches Earth because a thin gas between the stars carries the wave. What is the misconception?

After all air is pumped from a bell jar, a student predicts a faint ringing because sound can squeeze through vacuum. What should be corrected?

A script says astronauts hear a meteor's sonic boom before it enters any atmosphere. Which assumption is wrong?

A student says, 'Sound works underwater, so it must also work in a vacuum.' What is the best response?

What is disturbed when a mechanical sound wave travels through air?

Why can an electromagnetic wave travel from the Sun to Earth through space?

Which statement correctly explains why a vacuum chamber can block sound but not block visible light just by removing air?

A Mars rover sends data that later comes out of a speaker on Earth as beeps. What actually crossed space?

Which description fits a mechanical wave but not an electromagnetic wave?

Which place can carry ordinary sound from a source to a detector?

An electromagnetic wave enters glass from air. Which statement about the medium is correct?

A rope pulse and a flashlight beam both transfer energy. What key difference separates them?

In a perfect vacuum far from any matter, which kind of wave can still propagate?

Which option correctly pairs a wave with what it disturbs and whether it needs matter?

A wave on a stretched string and a radio wave are both transverse waves. Which statement about travel through a vacuum is correct?