Name: Date Due: Waves. Physical Science Chapter 6

Transcription

1 Date Due: Waves Physical Science Chapter 6

2 Waves 1. Define the following terms: a. periodic motion = b. cycle= c. period= d. mechanical wave= e. medium = f. transverse wave = g. longitudinal wave= h. surface waves= i. frequency= j. wavelength= k. amplitude= 2. What is period in respects to waves? 3. How do you think surface waves are related to transverse and longitudinal waves? 4. What unit is used to measure frequency? 2

3 5. In the diagram, which wave has a greater frequency? 6. How is wavelength measured in a transverse wave? 7. How is wavelength measured in a longitudinal wave? 8. What happens to the wavelength as you increase the frequency? 9. What is the equation for the speed of waves? 10. How can speed of a wave change? 11. How is energy related to amplitude? 12. In a transverse wave, how is amplitude measured? 13. In a longitudinal wave, how is amplitude measured? 3

4 14. Use the following terms to complete the sentences: Amplitude Crest Frequency Trough Wavelength a. The highest point on a wave is the, while the lowest point is the. b. The of a wave is a measure of the amount of energy it carries. c. The distance from one crest to the next crest is the d. The is a measure of the number of waves that pass a point in a given amount of time. 15. Label each part in the space below for the illustration of a wave using the terms in question 14. a. b. c. d. 16. Use the five illustrations of waves drawn below and the terms from question 14 to answer the following questions: a. Waves P and Q have the same, but wave P has twice the of wave Q. b. Waves Q and R have the same, but wave R has twice the of wave Q. c. Wave shows a steady frequency but changing amplitude. d. Wave shows steady amplitude but a changing frequency. e. Waves and have a low amplitude and a steady frequency. 4

5 Wave Interactions 17. Define the following terms: a. reflection= b. angle of reflection= c. refraction= d. diffraction= 18. What happens if waves strike a reflective surface at an angle other than 90? 19. Why does refraction occur? 20. Where would the fish appear to be if the man looked down at it from straight above its actual location? 21. When does diffraction occur? 22. How is wavelength related to diffraction? 23. What kind of wave interaction is the diagram? 5

6 Air Water 24. What kind of wave interaction is the diagram? 25. Draw the reflected wave in the picture. Incident Ray Mirror 26. What do you know about the angle of incidence and the angle of reflection? 27. Create a sketch of sound waves to show why you can hear a sound on the other side of brick wall. 6

7 Sound 28. Define the following terms: a. sound waves= b. speed of sound= c. intensity= d. loudness= e. wave frequency= f. pitch= g. infrasound= h. ultrasound= i. Doppler effect= j. outer ear= k. middle ear= l. inner ear= 29. What properties describe the behaviors of sound? 30. In general, how does that state of matter (solids, liquids, & gases) affect the speed of sound? 31. What does the sound intensity depend on? 7

8 32. How is intensity different than loudness? 33. What is the normal range a people can hear? 34. What happens to the sound as the source approaches you? 35. What happens to the sound as the source moves away from you? 36. Describe how the ear works. 37. Label 1 through 12 on the following diagram

9 Light 38. Define the following terms: a. electromagnetic waves= b. electromagnetic radiation= c. electromagnetic spectrum= d. radio waves= e. infrared rays= f. visible light= g. ultraviolet rays= h. X-rays = i. gamma rays = 39. Describe the relationship between the wavelength and frequency of electromagnetic waves. 40. What is included in the electromagnetic spectrum? 41. What is range of wavelength for each of the electromagnetic spectrum? 9

10 42. Describe how each part of the electromagnetic spectrum is used. (Give two examples) a. radio waves= b. infrared rays= c. visible light= d. ultraviolet rays= e. X-rays = f. gamma rays = 43. The composition of the ionosphere changes somewhat from day to night. The changes make the nighttime ionosphere even better at reflecting AM radio waves. How do you think this might affect the distance AM radio waves travel at night? 44. You should apply sunscreen even on cloudy days. Explain why it is important? 45. What do the dark areas in an X-ray image represent? 46. Predict how gamma rays might affect living things on Earth if they weren t absorbed by the atmosphere. 10