What is the cause of sound waves?

• Light waves

• Vibrations

• Chemical change

• Longitudinal waves

Sound waves travel through all mediums. Which of the following will sound travel through?

• air, water, space

• water, solids, gas

• space, air, metal

• metal, gas, space

Which series correctly orders media according to how quickly sound travels through each, from slowest to fastest?

• granite, water, air

• air, granite, water

• granite, air, water

• air, water, granite

An underwater volcano erupts. A fisherman on a boat at the surface is 10 km from the volcano. An underwater diver is also 10 km away. Which statement correctly describes their hearing of the volcano?

• The fisherman will hear the sound first.

• The diver will hear the sound first.

• They will hear the sound at the same time.

• Only the diver will hear the sound.

When a ruler is hit against a desk it creates _________________.

• calibration

• seismic waves

• sound waves

• compression

Suppose an astronaut is looking out the window of her spacecraft in outer space when two small comets collide and explode in front of her. She would:

• see and hear the explosion.

• see the explosion but not hear it.

• hear the explosion but not see it.

• not see or hear the explosion.

Sound waves move ______ from an object that makes a sound.

• outward in one direction

• outward in all directions

• upward

• downward

When you watch fireworks, you always hear the bang after you see the flash. This is because:

• when something explodes, the sound always happens after the flash.

• sound travels faster through the air than light.

• sound travels slower through the air than light.

• your ears take longer to send messages to your brain than your eyes do.

Through which material do sound waves travel the slowest?

• steel

• water

• plastic

• air

a disturbance caused by a vibration; they travel away from the source that makes them.

• Amplitude

• Wave

• Vacuum

• Wavelength