1. 3R3R 3L3L 05/25/11 Do Now: How many different WAVES are in this picture? How do you know? Write a paragraph. (No need to copy the question. ) 05/25/11 Observe, Question, Comment, Picture, or Logo Standard 6a: Students know visible light is a small band within a very broad electromagnetic spectrum. Objective: Students will… Explain what causes waves Describe the properties of waves New Vocabulary (Do not need to copy) 1.Wave 2. Energy 1.Medium 2.Vibration 3.Crest 4.Trough 5.Amplitude 6.Wavelength 7.Frequency 8.Hertz 1.Water waves—the ocean 3. Light waves—the sunlight shining down 2.Sound waves—the birds singing

2. 4R4R 4L4L 05/25/11 Observe, Question, Comment, Picture, or Logo NOTES Ch.2, Sec.1--Waves and Electromagnetic Spectrum Brain Pop: Waves Copy the next slide

3. NOTES Ch.2, Sec.1--Waves and Electromagnetic Spectrum A. Waves and Energy 1. Wave = disturbance that transfers E 2. Energy (E) = ability to do work 3. Medium = material through which the wave travels 4. Vibration = A repeated back-and-forth or up-and-down motion 5. Crest = the highest part of the wave 6. Trough = the lowest part of the wave 7. Amplitude (up and down) = the distance that the particles of a medium move away from their rest positions as the wave passes through --big amplitude  lots of energy --small amplitude  little energy 8. Wavelength (sideways) = the distance between two corresponding parts of a wave 9. Frequency = the number of complete waves that pass a given point in a certain amount of time --Long wavelength  low frequency --Short wavelength  high frequency 4R

4. 4R4R 4L4L 05/25/11 Observe, Question, Comment, Picture, or Logo NOTES Ch.2, Sec.1--Waves and Electromagnetic Spectrum Brain Pop: Waves 1. What do all waves have in common? 2.What does a mechanical wave need? 3. How are electromagnetic waves different from mechanical waves? 4. What are examples of electromagnetic waves? 5. How is the energy of the wave related to its amplitude? 6. Long wavelength  _____ frequency 7. Short wavelength  _____ frequency Challenge Question: Why can light travel through space, but sound cannot? Write a paragraph and/or draw a picture to explain your ideas. Copied from the last slide

5. Exit Slip: Waves 1.Draw a wave and use arrows to LABEL the 4 parts 2. What does a wave transfer? 3. Why does a bigger wave knock you over in the ocean and a smaller wave does not?