Unit 9 Wave Review

Game Time!Review of

Waves

Supplies Needed

• One white board for each student• One dry erase marker for each

student• Paper towel to erase• Calculator• Thinking caps!

Directions

• Each question will be for all students to answer

• Write your answer on your white board

• Turn it over• Hold up your board when asked• Only the first answer counts

Directions

• For each correct answer you will get a popsicle stick

• The 3 people with the most sticks at the end of the game get prizes• 1st – Grand prize• 2nd – Candy (3 pieces)• 3rd – Candy (2 pieces)

Question #1

• Identify the wave property labeled “A”

A

A

Answer: Amplitude

Question #2

• Identify the point labeled “B”

B B

Answer: Crest

Question #3

• Identify the point labeled “C”

C C

Answer: Trough

Question #4• Identify the wave property

labeled“D”

D

D

Answer: Wavelength

Question #5

• Identify “E”

E

Answer: Equilibrium position

E

Question #6

• The primary difference between an electromagnetic wave and a mechanical wave is that a(n) _____________ wave can travel through empty space while the other can not.

• Answer: electromagnetic

Question #7

• The energy of a wave depends on its __________________.

• Answer: Amplitude

Question #8

• In a _________________ wave, the medium vibrates vertically while the wave travels horizontally.

• Answer: Transverse

Question #9

• In a __________________ wave, the medium moves back and forth while the wave moves horizontally.

• Answer: Longitudinal or Compressional

Question #10

• What is the symbol for amplitude?

• Answer: A

Question #11

• Amplitude is measured in what units?

• Answer: meters (m)

Question #12

• What is the symbol for wavelength?

• Answer: λ

Question #13

• Wavelength is measured in what units?

• Answer: meters (m)

Question #14

• What is the symbol for period?

• Answer: T

Question #15

• A period is measured in what units?

• Answer: seconds

Question #16

• What is the symbol for frequency?

• Answer: f

Question #17

• Frequency is measured in what units?

• Answer: Hertz (Hz)

Question #18

• What is the symbol for wave speed or velocity?

• Answer: v

Question #19

• Wave speed is measured in what units?

• Answer: m/s

Question #20

• What equation relates period and frequency only?

• Answer: T = 1/f or f = 1/T

Question #21

• In a _______________ wave, the displacement of the particles in the medium is perpendicular to the direction of the wave propagation.

• Answer: Transverse

Question #22

• What equation can we use to find wave speed if we have wavelength and period?

• Answer: v = λ/T

Question #23

• The speed of a wave depends on the __________________.

• Answer: medium

Question #24

• In a __________________ wave, the displacement of the particles of the medium is parallel to the direction of the wave propagation.

• Answer: Longitudinal or Compressional

Question #25

• Wave _____________ (frequency or velocity) is the number of vibrations per second of a part of the medium

• Answer: frequency

Question #26

• As the wavelength of a wave increases, the frequency of the wave ________________.

• Answer: decreases

Question #27

• The frequency of a certain color of light is 4.2 x 1014 Hz. The speed of light is 3.0 x 108 m/s. Find its wavelength.

• Hint: v = fλ• Answer: 7.14 x10-7 m

Question #28

• A wave has a period of 12.0 s.

• What is the frequency?• Hint: f = 1/T• Answer: 0.083 Hz

Question #29

• The distance between a crest and the adjacent trough is 2.00 m.

• What is the wavelength?• Hint: Measured crest to crest• Answer: 4.00 m

Question #30

• A wave has a period of 12.0 s. The distance between a crest and the adjacent trough is 2.00 m. (f = 0.083 Hz and λ = 4.00 m)

• What is the velocity?• Hint: v = λ/T or v = f λ• Answer: 0.33 m/s

Question #31

• Identify “B”

B B

Answer: Crest

Question #32

• Identify “E”

E

Answer: Equilibrium position

E

Question #33

• Identify “D”

D

D

Answer: Wavelength

Question #34

• An ocean wave has a length of 10.0 m. A wave passes a fixed location every 2.0 s. What is the speed of the wave?

• Hint: v = λ/T• Answer: 5.0 m/s

Question #35

• A ________________ wave has properties of both a transverse and longitudinal wave.

• Answer: Surface

Question #36

• The shortest time interval during which the motion of a wave repeats itself.

• Answer: Period

Question #37

• The number of waves that pass a given point in 1 second.

• Answer: Frequency

Question #38

• The ___________ of a wave depends on the properties of the medium through which it is traveling.

• Answer: speed

Question #39

• What happens to the period of a wave as the frequency increases?

• Answer: decreases

Question #40

• Waves transfer _______________ without transferring matter.

• Answer: energy

Game Over!

• Count your sticks• Write how many sticks you have

on your board• Hold it up• Prizes will be awarded