Waves and Energy Give evidence that energy, not particles of matter, is transferred by waves. (pg 288 – 289)

Draw a before, during and after picture to show what happens to a boat as a wave passes under it.

Now describe in words what happens to a boat as a wave passes under it.

Define Medium –

Define Mechanical Wave -

Label each box according to the type of matter it is (vacuum, solid, liquid, gas)

Describe how SOUND energy would travel through each type of medium above.

P4.5A

P4.5B

P4.5C

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●

●

●

1

Transverse Waves

Label the parts of the transverse wave below.

Describe how the particles of a medium move in a transverse wave.

List three (3) real-life examples of a transverse wave.

1.

2.

3.

Describe what happens when the amplitude increases in a light wave.

P4.4A

P4.4B

P4.4C

2

Compressional Waves

Label the parts of the compression wave below.

Describe how the particles of a medium move in a compressional wave.

List three (3) real-life examples of a compression wave.

1.

2.

3.

Describe what happens when the amplitude increases in a sound wave.

P4.4A

P4.4B

P4.4C

3

Wave Speed

Define the following:

wavelength -

frequency -

amplitude -

Derive three calculations for the speed of a wave using the triangle below.

What would happen if a wave’s frequency increased?

What would happen if a wave’s wavelength decreased?

What would happen if a wave’s amplitude increased?

Light Sound

Fast None

Slow

Slow Fast

VACUUM

GAS

LIQUID

SOLID

S

λ ƒ

P4.9A

Use the diagram to

compare & contrast

how each wave type

moves in different

mediums.

●

S =

●

λ =

●

ƒ=

4

Section 10.1/10.2/11.1 Review Summary

Waves and Energy

A wave is a repeating disturbance that transfers through matter

and space.

Waves transfer energy without transporting .

Waves are produced by .

Mechanical Waves

Mechanical waves MUST .

Mechanical waves can be or

.

In a transverse wave, matter moves at to the wave

motion.

In a compressional wave, matter moves along the

direction of the wave motion.

Describe the motion of a buoy when a water wave passes by.

Why do boats need anchors if ocean waves do not carry matter forward?

The average speed of sound in water is 1,500 m/s. How long would it take a sound wave to

travel 9,000m?

6

The Parts of a Wave

__________________ waves have repeating high points called ____________ and low

points called ________________.

____________________ waves have repeating high-density regions called

____________ , and low density regions called_____________________.

Wavelength, Frequency and Period

A wave’s is the distance between two nearest points

on a wave.

A wave’s is the number of

pass a fixed point each second.

A wave’s is the amount of it takes one

wavelength to pass a fixed point.

Wave Speed and Amplitude

The speed of a wave depends on it is traveling in

and the .

As the amplitude of a wave , the energy transferred by the wave

.

Describe how the wavelength of a wave changes when the wave slows down but its

frequency doesn’t change.

Explain how the frequency of a wave changes when the period of the wave increases.

Why would a sound wave travel faster in a solid rather than in a gas?

7

Sound Waves

Sound waves are that are produced by .

Sound usually travels in solids and in gases.

Sound travels faster as the temperature of the medium .

Properties of Sound

The amplitude of sound waves as the density of particles increases in

the compressions and in the rarefactions.

_____________________is the human perception of the intensity of sound waves.

is the human perception of the frequency of sound waves.

The Doppler Effect is the change in the of a sound wave when the

source of the sound is relative to the listener.

Explain how the loudness of a sound wave depends on the the intensity of the sound waves.

Describe how sound travels from your vocal cords to your friend’s ears as you talk.

Explain why windows might begin to rattle when an airplane flies overhead.

For a sound with a low pitch, what else is also always low?

a. amplitude b. frequency c. wavelength d. wave speed

Based on the data in the table, which of the following would be the speed of sound in air at 30°C?

a. 340.4 m/s

b. 346.4 m/s

c. 349.4 m/s

d. 353.4 m/s 8

Chapter 10 REVIEW Answer the following questions on pages 314 – 315. Use the spaces below to write your

answers.

1.

9. 16.

3.

10. 17.

6.

11. 19.

7.

12. 22.

8.

13. 28.

9

Light - Refraction

Define the following:

refraction -

concave -

convex -

Describe what occurs to ….

Describe how light goes through a concave lens and what occurs.

Describe how light goes through a convex lens and what occurs.

P4.8A

P4.8B

P4.9A

P4.9B

Water

Air

… a light waves as it

goes from a more

dense medium

(water) to a less

dense medium (air).

Draw it.

… a light waves as it

goes from a less

dense medium (air)

to a more dense

medium (water).

Draw it. Water

Air

10

Light - Reflection

Define the following:

reflection -

opaque -

translucent –

transparent -

Describe what occurs when light strikes a plane mirror.

Describe what occurs when light strikes a convex mirror.

Describe what occurs when light strikes a concave mirror.

P4.8A

P4.8B

P4.9A

P4.9B

11

Light & Sound

Define the following:

angle of incidence –

angle of reflection –

Label the angle of reflection and angel of incidence in the diagram below.

Wave Type Speed Medium(s) it can travel through

Sound

Light

Explain why we see lightning before we hear a thunder clap.

Using refraction, explain why the sun’s image appears reddish at sunrise and sunset.

P4.6D

P4.9C

12

Section 11-2/11-3 Review Summary

Reflection of Light

Light waves ALWAYS obey the law of reflection: the angle of

equals the angle of .

_____________________reflection causes parallel light waves to be reflected in only

one direction.

______________________reflection causes parallel light waves to be reflected in many

directions.

______________________occurs when light waves are reflected and travel in many

different directions.

Refraction of Light

Refraction occurs when

The index of refraction of a material indicates how much light down

in the material compared to empty space.

Mirrors

A plane mirror forms .

Convex mirrors always produce virtual, images that are

than the object.

Lenses

Concave lenses always form virtual, images that are

than the object.

Convex lenses always form virtual, images that are

than the object. Explain why you can see your reflection in a smooth piece of aluminum foil but NOT in a crumpled ball of foil.

Which of the following BEST describes image formation by a plane mirror?

a. A real image is formed in front of the mirror.

b. A real image is formed behind the mirror.

c. A virtual image is formed in front of the mirror.

d. A virtual image is formed behind the mirror. 13

Electromagnetic Spectrum

Define the following:

electromagnetic spectrum –

Identify the region limits of the EM spectrum in the diagram below.

Describe what occurs to wavelength, frequency and energy as you go from left to right on the EM spectrum.

The part of the EM spectrum humans can see/perceive is .

Explain why radio waves are used for space communication.

Explain why there is a delay when sending radio waves. Draw a picture to help explain.

P4.6A

P4.6B

P4.6C

14

15

Section 15.2 Review 1. ___________________ are the type of electromagnetic waves used for communication.

2. A remote control uses to communicate with a television set.

3. Electromagnetic waves transmit .

4. If you stay outdoors too long, your skin might be burned by exposure to from the sun.

5. Transverse wave that are produced by vibrating electric charges and consist of vibrating electric and magnetic fields are .

6. Which type of electromagnetic wave is the most energetic?

7. Which type of electromagnetic wave enables skin cells to produce vitamin D?

8. Which type of electromagnetic wave has wavelengths GREATER than about 1mm?

9. Which color of visible light has the shortest wavelength?

10. Use the graph to answer the following question.

What signal as the longest wavelength?

11. Which of the following describes X-rays?

a. Short wavelength, high frequency

b. Short wavelength, low frequency

c. Long wavelength, high frequency

d. Short wavelength, low frequency

12. Do all electromagnetic waves always travel at the speed of light? Explain your response.

16

Waves & Energy

Notes

Name:_________________________ Hr:__________