Bellringer Which color of light bends the least and why: red, green, blue

Waves A Review

1.A wavelength of 2mm and a frequency of 3Hz has a speed of_____. 6 mm/s

2. ___ reflection occurs when parallel rays of light hit a smooth surface? D. Regular C. Incidental B. Irregular A. Diffuse

3.If a sound source is moving away from you, you will hear a _____. D. higher pitch C. lower pitch B. lower amplitude A. higher freqeuncy

4.In _____ waves, the particles of the medium move at right angles to the direction in which the wave is traveling. D. sound C. longitudinal B. transverse A. compressional

5.Microwave radiation has a higher frequency than _______. D. ultraviolet C. radio B. gamma A. visible

6.An opaque object has a particular color because it reflects some wavelengths of light and _______ the rest. D. Echoes C. Transmits B. Reflects A. Absorbs

7.As the frequency of a wave traveling at constant speed increases, its _____ decreases. D. speed C. amplitude B. wavelength A. energy

8._____ mirrors are used on the passenger sides of vehicles to allow for a wider range of view. D. Fun-house C. Convex B. Plane A. Concave

9.Secondary waves CANNOT travel through _____. D. plasmas C. gases B. liquids A. solids

10.Place the colors of light in order from SHORTEST wavelength to LONGEST wavelength. Violet Indigo Blue Green Yellow Orange Red

11.Sound is a disturbance that travels through a medium as a(n) _____ wave. D. longitudinal C. transverse B. electromagnetic A. polarized

12.Waves combine to make a wave with larger amplitude in a process called _____ interference. D. constructive C. mirage B. destructive A. refraction

13.You have recently shown an interest in the inner workings of an electric motor. You wonder exactly how it can go faster when you press the accelerator with your foot. You plan to design an experiment to prove that pressing the accelerator increases the voltage to the electric motor, therefore making it rotate faster. You devise a hypothesis that states that if voltage is increased to the electric motor, then the motor will increase its revolutions per minute. Which 2 of the following factors, in this scenario, would be classified as the controlled variables? the motor the rpms the voltage the wires

14.Because the light rays never meet, a concave lens can produce only a(n) _______ image. D. virtual C. holographic B. real A. black & white

15.List the waves of the Electromagnetic Spectrum from LOWEST frequency to HIGHEST frequency. Radio waves Microwaves Infrared Visible light Ultraviolet X-rays Gamma rays

16.At room temperature, the speed of sound in air is approximately how many m/s? D. 300,000 m/s C. 343 m/s B. 343 km/s A. 300,000 km/s

17. The buildup of charges on an object is known as _____? D. static electricity C. negative charge B. static discharge A. positive charge

18. A virtual image always appears _______. D. upside-down C. larger B. upright A. smaller

19.If something vibrates one thousand times per second, it has a frequency of 1 _______. D. MHz C. kHz B. Hz A. GHz

20.The colors of visible light with _____ bend less than others when passing through a prism. D. shorter wavelengths C. longer wavelengths B. higher frequencies A. higher amplitudes

21. Ultraviolet rays help your body to produce _______.. D. calcium C. hormones B. vitamin D A. hair

22.Name the type of wave labeled C. D. Infrared A. Ultraviolet B. Visible C. X-ray

23.In which medium listed in the table does sound travel slowest? C. 20°C C. Hardwood B. 0°C A. Brick

24.The speed of a wave on a guitar string is 220m/s and the frequency is 110Hz. What is the wavelength of the wave? 2 m/s

25.Because of _______, glass prisms separate white light into the visible spectrum of colors. D. diffusion C. refraction B. diffraction A. reflection

26.In a longitudinal wave moving along a spring, areas where the coils are farthest apart are called _____. D. rarefactions C. crests B. compressions A. troughs

27. Match each unit on the left with what it measures on the right. V H Ω A kWh W Energy Power Resistance Voltage Current Time

28.A wave bending as it passes a point of land is an example of _____. D. diffraction C. refraction B. reflection A. transmission

29. The unit associated with _____ is the hertz. D. Wavelength C. amplitude B. frequency A. speed

30.Suppose that a reflected light wave has an angle of reflection of 20°. What must be the angle be between the reflecting surface and the original beam of light? D. 90° C. 70° B. 50° A. 30°

31.A tomato will look _______ under blue light? D. black C. red B. blue A. white

32. Of the following, which is the correct speed of light? D. 3 x 10 5 km/s C. 343 m/s B. 300,000,000 km/s A. 3 x 10 8 km/s

33.Which of the following would be classified as quantitative data? 2.44 GHz hot 300,000 km/s blue transparent 22 nm

34.Sound waves with frequencies above 20,000 Hz are too high for humans to hear. This is known as _____. D. hyposonic C. infrasonic B. hypersonic A. ultrasonic