Chapters 17-18 Test Study Guide

Question 1

A mechanical Wave moves through a medium which could be a _____,____,____

Answer 1

1. Solid 2. Liquid 3. Gas

Question 2

A disturbance sends ripples across water in a tub. These ripples are an example of a type of wave?

Answer 2

Surface wave

Question 3

When a surfer rides an ocean wave on her surfboard. she is actually riding on what part of the wave?

Answer 3

A crest that is toppling over

Question 4

To determine the speed of a wave, what formula?

Answer 4

Speed=(Wave Length)(Frequency)

Question 5

A wave length of 15mm and a frequency of 4 Hertz. What is the speed?

Answer 5

60 m/s

Question 6

How do you find the amplitude of a wave?

Answer 6

Use trough to rest position or crest to rest position

Question 7

When a wave strikes a solid barrier, it behaves like a basketball hitting a backboard. This behavior is called what?

Answer 7

Reflection

Question 8

Suppose two waves collide and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?

Answer 8

Destructive inference

Question 9

A sound wave is an example of a what type of wave?

Answer 9

Longitudinal

Question 10

A piano, violin, or guitar uses the resonance of a wooden soundboard to do what?

Answer 10

Amplify the sound

Question 11

A ambulance siren… What scientific term would you use to explain how this happens?

Answer 11

The doppler effect

Question 12

When a sound source approaches you, what happens to the pitch of the sound?

Answer 12

it becomes higher than when stationary

Question 13

Which part of the ear amplifies the vibrations from sound waves?

Answer 13

Middle Ear

Question 14

The part of the ear that sends coded nerve signals to the brain is what?

Answer 14

The inner ear

Question 15

To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its ___?

Answer 15

Wavelength

Question 16

Light acts like what?

Answer 16

Wave and particle

Question 17

Photons travel outward from a light source in which direction?

Answer 17

All directions

Question 18

How do Polarized glasses work?

Answer 18

Blocking waves that vibrate in one plane

Question 19

When droplets of water in the atmosphere act like prisms, the colors in sunlight undergo what?

Answer 19

Dispersion

Question 20

What an object is made of and the color of light that strikes it determines what?

Answer 20

Color of an object

Question 21

What are the primary colors of light?

Answer 21

Red… Blue.. Green

Question 22

What are the primary colors of pigments?

Answer 22

Magenta.. Cyan…. Yellow (Same as secondary colors of light… Combines to black)

Question 23

Many streets and parking lots are illuminated with what type of light?

Answer 23

Sodium Vapor Lights

Question 24

Instead of crests and troughs, as in an ocean wave, a longitudinal wave has compressions and _______.

Answer 24

Rarefactions

Question 25

A pebble drops down into a tub of water, setting off _____ Waves that travel between the water and air.

Answer 25

Surface

Question 26

In a transverse wave, _____ is measured from crest to crest or from trough to trough

Answer 26

Wavelength

Question 27

TO determined the speed of a wave, you must know the waves wave length and ____.

Answer 27

Frequency

Question 28

If a wave length of 2 m and a frequency of 3 hertz, its speed is _____

Answer 28

2 M/S

Question 29

To compare the energy of different waves, measure the _______ of the waves.

Answer 29

Amplitude

Question 30

Amplitude measures the greatest displacement of a wave from the ______.

Answer 30

Rest position

Question 31

If two waves collide and form a temp. larger wave, the interference is ____.

Answer 31

Constructive

Question 32

The standard measure used to compare sounds intensities is the ___.

Answer 32

Decibel

Question 33

When I train streaks by blowing it's whistle, the changing picture here is due to the ______.

Answer 33

Doppler Effect

Question 34

The further away you are from a light source the____ intense it is

Answer 34

Less

Question 35

Electromagnetic waves can travel through a

Answer 35

Vaccuum

Question 36

Visible light waves have a shorter _____ then infared waves have

Answer 36

Wave length

Question 37

What unit is way frequency measured?

Answer 37

Hertz

Question 38

Supposed to waves meet and temporarily cancel each other out. How would you describe the inference?

Answer 38

Destructive

Question 39

What is the Doppler Effect?

Answer 39

Sound approaches higher frequency, sound moves away lower frequency

Question 40

Use the scattering of light to explain why the sun is red at sunset

Answer 40

Blue light scattered by small particles leaving red and orange

Question 41

What type of light passes through a polarizing filter?

Answer 41

White that vibrates in one plane

Question 42

What two factors influence the color of an object?

Answer 42

The color of light striking

Question 43

Both wave A and wave B were started by the same type of force and up-and-down motion. What conclusion can you make about the energy of these two wave starting forces?

Answer 43

Force causeway A to have more energy

Question 44

Explain why the pencil appears to be broken

Answer 44

Light moves as it goes through one medium to another so it appears broken

Question 45

Figure represents white light striking an object. Explain why the beam of light is also labeled with colors

Answer 45

White light is made up of all the frequencies that produce colored light

Question 46

Was a wave movement during one second. What is the frequency of this wave?

Answer 46

2 hertz

Question 47

To what is amplitude related

Answer 47

Related to the amount of energy carried by a wave to maximum displacement from rest position