Ms. BandyGeneral Science – Wave Interactions

Day 1

Day 2

Parts of Waves

Objective: Students will be able to observe characteristics of waves in order to identify parts of waves.

Homework: Wave Interactions Homework 1 (Due Fri 3/2)

Monday February 27th, 2012Warm-up: (1) Why is the spring toy considered a medium? (answer in complete sentences)

(2) A _________is a disturbance that transfers __________ from place to place

Vocabulary Reference Wave A disturbance that transfers energy from one place to another

EnergyThe ability to do work ; or the ability to cause matter to move or change

MediumThe material through which the wave travels

Parts of Waves

I always thought that waves were only found at the beach and they carried me to the shore; but, now I know that isn’t true!

True. The waves don’t carry you, but as

you sit on your board, don’t you rise up with the wave?

Yes! That’s right. I bet that rise has a name and knowing more about that name will definitely land us that job we want!

INBOX

From

Demonstration

Describe different wave-like motions you have observed in your life. How are they similar or

different to the movement you observed?

1. Observe the demonstration of wave motion by your teacher.

2. Illustrate the movement of the water

To understand the parts of waves, it helps to represent a wave on a diagram. In this activity, you will generate waves on a rope and use your data to illustrate the parts of a wave.

Observe the demonstration by your instructor.

Making Waves(1) Lay the rope on top of the masking tape.

(2) Hold one end of the rope without moving while your partner makes a steady side-to-side motion so that one “hill” and one “valley,” is formed with the rope.

(3) Mark the “hill” and “valley” by laying your pencil across them.

(4) Illustrate your wave on Page 16. (include the masking tape in your drawing)

(5) Measure the distance from the tape to the hill and from the tape to the valley. Record your measurements on your paper.

Making WavesUse information from pages 12-13 of Prentice

Hall: Science Explorer, Sound and Light to label your diagram with the parts of waves.

Be sure to include: Rest position CrestTroughAmplitudewavelength.

AnalysisIdentify one other example of wavelike

motion that happens in everyday life that has not been mentioned.

Explain why your example demonstrates wavelike motion.

Parts of Waves

Objective: Students will be able to observe characteristics of waves in order to identify parts of waves.

Homework: Wave Interactions Homework 1 (Due Fri 3/2)

Tuesday February 28th, 2012Warm-up: (1) How do waves transfer energy? (answer in complete sentences)

(2) Waves are produced when a source of energy causes a medium to…

A. Shrink B. Expand C. Vibrate D. Move

Wave PracticeDraw a wave as shown by your instructor on

page 18.

As a new part of the wave is presented, add it to your diagram and include the definition!!!

Parts Crest Trough

WavelengthAmplitude

Rest Position

CrestThe highest part of a transverse wave.

TroughThe lowest part of a transverse wave.

Rest PositionThe position at which the wave is at rest.An imaginary line that represents where the

medium would be if the energy stopped being transferred.

WavelengthThe distance between two identical points on

neighboring waves.The measured distance from one crest to another

crest or from one trough to another trough

AmplitudeThe maximum distance that the medium

moves from the rest position.

Types of Mechanical WavesExamine Figure 5 on page 12-13 in Prentice

Hall: Science Explorer, Sound and Light.

Construct a Venn diagram or chart to compare

a transverse and longitudinal wave.

Vocabulary Reference Mechanical Wave A wave that requires a medium through which to travel.

Figure 1: Diagram of a Wave

1. In Figure 1, “Diagram of a Wave,” wavelength is represented by letter ___

2.2. Identify how many waves there are in Figure Identify how many waves there are in Figure 1. ____________1. ____________

Analysis #33. Using Figure 1, explain what would happen to the number of waves if the wavelength increased. JustifyJustify your your response.response.

The number of waves will decrease, because The number of waves will decrease, because the wavelength is increasing. the wavelength is increasing.

Exit TicketFIGURE 1DIAGRAM OF A WAVE

In Figure 1, “Diagram of a Wave,” wavelength is represented by letter ________.

Using Figure 1, identify and explain which letter would be most affected if the amplitude increased. Justify your response

Transverse waveA wave in which the vibration is moving in

a direction perpendicular to which the wave is traveling.

Longitudinal WaveA wave in which the vibration is moving in

the same direction that the wave is traveling.