Unit 3 Evaluation Evaluation 03 Physical Science 1 SCIH 023 055

Name _________________________________ I.D. Number _______________________ Unit 3 Evaluation Evaluation 03 Physical Science 1 SCIH 023 055 This evaluation will cover the lessons in this unit. It is open book, meaning you can use your textbook, syllabus, and other course materials. You will need to understand, analyze, and apply the information you have learned in order to answer the questions correctly. To submit the evaluation by mail, follow the directions on your Enrollment Information Sheet. To take the evaluation online, access the online version of your course; use the navigation panel to access the prep page for this evaluation and follow the directions provided. Part A: Matching Match each term with its correct definition. a. nearsighted b. pupil c. cornea d. cones e. farsighted _____ 1. the vision you have when the light entering your eye is focused in front of your retina _____ 2. the transparent covering on your eye that causes light rays to bend and converge _____ 3. the part of your eye that absorbs red, blue and green light _____ 4. being able to see distant images clearly but having difficulty in creating a clear focus of close-up objects _____ 5. the part of your eye that adjusts the amount of light that enters your eye Part B: Multiple Choice Select the response that best completes the statement or answers the question. _____ 6. Which of type of waves can travel without a medium? a. b. c. d. Unit 3 Evaluation sound radio mechanical transverse SCIH 023 _____ 7. The type of waves that pass through a coiled metal spring are called a. b. c. d. _____ transverse waves. electromagnetic waves. longitudinal waves. seismic waves. 8. The average speed of sound in water is approximately 1,500 m/s. If the noise from a boat takes 5.0 seconds to reach an underwater detector, how far away is the boat? (d/s = t) a. b. c. d. _____ 0.0033 m 300 m 1,505 m 7,500 m 9. Which of the following produces electromagnetic waves? a. b. c. d. direct current vibrating electric charge static electric charge constant electric field _____ 10. The speed of electromagnetic waves is a. b. c. d. different for each frequency in a vacuum. less in a vacuum than in water. 300,000 km/s in a vacuum. faster than the speed of light in a vacuum. _____ 11. Electromagnetic waves a. b. c. d. are longitudinal waves. are transverse waves. must travel through a medium. do not interact with matter. _____ 12. If you hear a musical sound from an instrument that is vibrating the air at 200.0 Hz and traveling at 340 m/s, what is the wavelength of that music? (Hint: use the wave speed equation: v =f λ ) a. b. c. d. Unit 3 Evaluation 1.7 m 0.59 m 68,000 m 0.0050 m SCIH 023 _____ 13. When the crest of one wave passes through the trough of another wave, what takes place? a. b. c. d. resonance constructive interference destructive interference diffraction _____ 14. To what is the size of the disturbance from a wave related? a. b. c. d. frequency wave speed amplitude refraction _____ 15. The number of wavelengths that pass a fixed point each second is the _______ of those waves. a. b. c. d. frequency period wavelength amplitude _____ 16. When light strikes an object and bounces off its smooth surface it is called a a. b. c. d. refraction. regular reflection. diffuse reflection. mirage. _____ 17. The wavelength of purple light is _____ that of yellow light. a. the same as b. longer than c. shorter than _____ 18. Which part of the electromagnetic spectrum is usually used for communication? a. b. c. d. radio waves infrared waves ultraviolet waves gamma rays _____ 19. In order for you to see a yellow chair, what wavelength(s) of light reflected from the yellow chair does your eye perceive? a. b. c. d. Unit 3 Evaluation red green yellow red and green light SCIH 023 _____ 20. If light waves change speed when they pass from one medium into another, the light will be a. b. c. d. diffused. reflected. refracted. translucent. _____ 21. The primary light colors are a. b. c. d. magenta, cyan and yellow. red, blue, and green. yellow, blue, and green. red, yellow, and cyan. _____ 22. Which type of light uses phosphors to convert ultraviolet radiation to visible light? a. b. c. d. incandescent light fluorescent light neon light laser light _____ 23. Which is the purpose of resonance in musical instruments? a. b. c. d. to increase the pitch to amplify the sound to decrease the pitch to create overtones _____ 24. If you pass by a building with a siren sounding, as you move away from the building, the sound of the sirens will be a. higher-pitched. b. lower-pitched. c. the same. _____ 25. Seeing an image in a mirror is a function of what behavior of light? a. b. c. d. refraction diffraction reflection resonance _____ 26. When a wave bends around an object it encounters it is called a. b. c. d. Unit 3 Evaluation interference. diffraction. reflection. refraction. SCIH 023 _____ 27. Musicians use the concept of resonance in sound waves. What causes resonance? a. Resonance is the vibration of waves that take place when the angle of incidence matches the angle of reflection. b. The resonance of waves takes place when nodes do not align. c. Resonance takes place when an object vibrates by absorbing energy at its natural frequencies. d. Destructive interference causes resonance. _____ 28. The decibel scale measures a. b. c. d. sound intensity. the number of rarefactions in sound. the Doppler effect. pitch intensity. _____ 29. Humans can generally hear sounds with frequencies ranging from 20.0 to 20,000 Hz. This means that a. b. c. d. humans have no difficulty hearing sounds in this range. humans have difficulty hearing high-pitched sounds above 20,000 Hz. humans have difficulty hearing low-pitched sounds below 20.0 Hz. all of these statements about human hearing are true. _____ 30. What determines the pitch of the sound produced in wind and brass instruments? a. b. c. d. the length of the vibrating tube of air in the instrument how tightly the membrane is fastened across the resonator the tightness of the strings the shape of the resonator _____ 31. Which of the following types of containers would allow you to clearly see if there were ice cubes inside? a. b. c. d. opaque translucent transparent incandescent _____ 32. Which of the following colors is bent the least as it exits a prism? a. b. c. d. Unit 3 Evaluation blue yellow green red SCIH 023 _____ 33. What is the main cause of mirages? a. Light diffracts through the opening in human eyes. b. Light waves are refracted as they pass through air of different densities. c. The normally diffuse scattering of light becomes focused due to the index of refraction of the medium. d. The temperature changes in the layers of air cause the light to bend around edges of the actual object. _____ 34. In which type of mirror do the reflected images look farther away than they actually are? a. plane b. concave c. convex _____ 35. Which part of the human eye contains light-sensitive cells that convert an image into electrical signals? a. b. c. d. cornea retina lens pupil _____ 36. Which of the following describes the chief reason for color blindness? a. b. c. d. The cones in the retina are not functioning properly. The lens of the eye is too convex. The rods in the retina are not functioning properly. The distance between the lens and retina is too short. _____ 37. Which of the following lists of electromagnetic waves is in the correct order from lowest to highest frequency? a. b. c. d. microwaves, visible light, radio waves microwaves, radio waves, visible light visible light, radio waves, microwaves radio waves, microwaves, visible light _____ 38. What type of waves does a remote control device use to communicate with a television set? a. b. c. d. Unit 3 Evaluation microwaves radio waves carrier waves infrared waves SCIH 023 _____ 39. Which type of electromagnetic waves are used by your body to produce vitamin D? a. b. c. d. infrared waves ultraviolet waves microwaves visible light rays _____ 40. Ozone in Earth’s upper atmosphere is most helpful in absorbing potentially damaging a. b. c. d. ultraviolet waves. infrared waves. microwaves. gamma rays. _____ 41. Which of the following is true for AM radio waves? a. The typical frequency range is in the 100 million Hertz range. b. Their changing amplitudes produce changes in the electrical field of your radio antenna. c. The amplitude of the carrier waves is altered as the station broadcasts. d. AM radio waves tend to provide a clearer signal than FM carrier waves. _____ 42. According to your textbook, how many satellites have been launched into orbit around the Earth? a. b. c. d. 10 to 50 50 to 200 200 to 1,000 over 1,000 Part C: True or False Choose whether each of the following statements is True or False. _____ 43. Sound waves do not carry energy. a. True b. False _____ 44. Refraction occurs when a wave strikes an object and bounces off, moving in another direction. a. True b. False _____ 45. The angle at which light strikes a surface is the same as the angle at which it is reflected. a. True b. False Unit 3 Evaluation SCIH 023 _____ 46. A three-dimensional photographic image of an object is a hologram. a. True b. False _____ 47. Both a convex lens and a concave mirror cause light rays to converge and form different types of images, depending on the position of the object relative to the focal point. a. True b. False _____ 48. Mechanical waves need matter to travel through and they are only transverse waves. a. True b. False _____ 49. A process called convergence is when two or more waves overlap and combine to form a new wave. a. True b. False _____ 50. A wave’s velocity can be calculated by dividing its frequency by its wavelength. a. True b. False Carefully check your answers on this evaluation and make any corrections you feel are necessary. When you are satisfied that you have answered the questions to the best of your ability, transfer your answers to an answer sheet. Please refer to the information sheet that came with your course materials. Unit 3 Evaluation SCIH 023
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