Chapter 9

Question 1

Wave

Answer 1

A repeating disturbance that transfers energy through matter or space.

Question 2

Medium

Answer 2

Matter through which a wave travels.

Question 3

Mechanical Wave

Answer 3

Waves that can only travel through matter. They can be either transversal or longitudinal.
Ex. Sounds Waves

Question 4

Transverse Wave

Answer 4

Particles in the medium move back and forth at right angles to the direction that the wave travels.

Question 5

Longitudinal Waves

Answer 5

Matter in the medium moves back and forth along the same direction that the wave travels.

Question 6

Crests

Answer 6

The highest point on a transverse wave.

Question 7

Troughs

Answer 7

Lowest point of a transverse wave.

Question 8

Compression

Answer 8

Denser region of a longitudinal wave.

Question 9

Rarefaction

Answer 9

Less dense region of a longitudinal wave

Question 10

Wavelength

Answer 10

Distance between one point on a wave and the nearest point just like it.

Question 11

Frequency

Answer 11

the number of wavelengths that pass a fixed point each second. When frequency increases, the period decreases.

Question 12

Period

Answer 12

Amount of time it takes one wavelength to pass a point. When frequency decreases, the period increases.

Question 13

Amplitude

Answer 13

A measure of the size of the disturbance of a wave, related to the energy that it carries.

Question 14

Refraction

Answer 14

The bending of a wave caused by a change in its speed as it travels from one medium to another.

Question 15

Diffraction

Answer 15

The bending of a wave around an object.

Question 16

Interference

Answer 16

The process of two or more waves overlapping and combining to form a new wave.

Question 17

Standing Wave

Answer 17

A special type of wave pattern that forms when waves equal in wavelength and amplitude constantly interfere with one another and traveling in opposite directions.

Question 18

Nodes

Answer 18

Locations where the interfering waves always cancel.

Question 19

Resonance

Answer 19

The process by which an object is made to vibrate by absorbing energy at its natural frequencies.

Question 20

What object could you use to represent a transverse wave and why would you choose that object?

Question 21

What object could you use to represent a longitudinal wave and why would you choose that object?

Question 22

After understanding more about waves, how can this information add to your life?

Answer 22

As someone hopefully working in the music area career-wise, It’s helpful to understand how sound waves work and how I can use them in my work.

Question 23

True or False: Waves carry energy without transporting matter

Answer 23

True

Question 24

True or False: The speed of a wave is the product of its frequency and its wavelength

Answer 24

True