WAVES

Mechanical Waves- Basic Terms

100

This the material through which a wave travels.

What is a medium?

200

These are the names for the three types of mechanical waves. 

What are Transverse Waves, Longitudinal Waves, and Surface Waves

300

These are the names for the highest point above the rest position and the lowest point below the rest position of a wave.

What are crests and troughs?

400

These two terms refer to the areas of waves where the particles in the medium are spaced close together and where they are spread out.

What are compressions and rarefactions?

500

This is how a wave is created.

What is it when a source of energy causes a vibration to move through a medium?

600

The interference between incoming and reflected waves produces this.

Standing Wave

Properties of Mechanical Waves

100

This is the term for the maximum displacement of the medium from its rest position

What is Amplitude?

200

This term refers to the is the number of complete cycles in a given time.

What is the **frequency*** of a wave?

300

This unit of measurement is used to describe a wave's frequency, and it represents the number of cycles per second.

What are Hertz?

400

This is the term for any motion that occurs in regular intervals of time.

What is periodic motion?

500

This is the term for the time required for one cycle, a complete motion that returns to its starting point.

What is a period?

600

This is when a wave bends around an obstacle.

diffraction

Mechanical Waves - Behavior

100

This is the relationship between the frequency vibrating source creating the wave and the frequency of the wave itself?

What is equal?

200

This is the relationship between frequency and wavelength.

What is "inversely proportional"?

300

This causes a wave to have greater amplitude

What is "greater energy"?

400

This is the term for what happens when a wave bounces off of a surface it cannot pass through.

What is "reflection"?

500

This is the bending of a wave when it enters a new medium at an angle.

What is "refraction"?

600

This is located between the middle and outer ear.

Eardrum

Mechanical Waves - Behavior Cont'd

100

This term refers to the bending of a wave as it moves around an obstacle or passes through a narrow opening

What is "diffraction"?

200

This term refers to when two or more waves overlap and combine together.

What is "interference?"

300

These two terms refer to when waves combine to produce a wave with either a larger a larger or a smaller displacement.

What are constructive interference and destructive interference?

400

This is the term for a wave that appears to stay in one place and doesn't seem to move through a medium.

What is "standing wave"?

500

The speed of a wave depends on the properties of the ____________ through which the wave propagates and not on the mechanism that is generating the wave.

What is the medium?

600

These two phenomena can affect sound quality

reflection and interference

Other

100

This is a change in frequency caused by the motion of the sound source

Doppler Effect

200

This is used in a variety of applications including sonar and other imaging

ultrasound

300

This uses nerve ending to sense vibrations and send signals to the brain.

inner ear

400

This is the point on a standing wave where the greatest displacement occurs

Antinode

500

the greatest displacement of a wave represents its __.

amplitude

600

Emile Berliner invented this technology which stores sound as grooves in the wax surface of a flat disc.

Gramophone