# Ms. Bandy General Science – Wave Interactions

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Ms. Bandy General Science – Wave Interactions
Day 1 Parts of a Wave Day 2 Ms. Bandy General Science – Wave Interactions

17 Parts of Waves Monday February 27th, 2012 Warm-up:
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, 2012 Warm-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 Energy The ability to do work ; or the ability to cause matter to move or change Medium The material through which the wave travels

Parts of Waves INBOX 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! From

17 Demonstration 1. Observe the demonstration of wave motion by your teacher. 2. Illustrate the movement of the water Describe different wave-like motions you have observed in your life. How are they similar or different to the movement you observed?

Observe the demonstration by your instructor.
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 16 (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.

16 Making Waves Use information from pages of Prentice Hall: Science Explorer, Sound and Light to label your diagram with the parts of waves. Be sure to include: Rest position Crest Trough Amplitude wavelength.

16 or 17 Analysis Identify one other example of wavelike motion that happens in everyday life that has not been mentioned. Explain why your example demonstrates wavelike motion.

19 Parts of Waves Tuesday February 28th, 2012 Warm-up:
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, 2012 Warm-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

18 Wave Practice Draw 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 of Waves

Parts Crest Trough Amplitude Wavelength Rest Position

Crest The highest part of a transverse wave.

Trough The lowest part of a transverse wave.

Rest Position The position at which the wave is at rest. An imaginary line that represents where the medium would be if the energy stopped being transferred.

Wavelength The distance between two identical points on neighboring waves. The measured distance from one crest to another crest or from one trough to another trough

Amplitude The maximum distance that the medium moves from the rest position.

Types of Mechanical Waves
19 Types of Mechanical Waves Examine Figure 5 on page 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. Identify how many waves there are in Figure 1. ____________

Analysis #3 3. Using Figure 1, explain what would happen to the number of waves if the wavelength increased. Justify your response. The number of waves will decrease, because the wavelength is increasing.

Exit Ticket FIGURE 1 DIAGRAM 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 wave Longitudinal Wave
A wave in which the vibration is moving in a direction perpendicular to which the wave is traveling. Longitudinal Wave A wave in which the vibration is moving in the same direction that the wave is traveling.