8th+Light,+Color,+Sound

LIGHT, COLOR, & SOUND WAVES TEST 1. (4 pts) Explain the difference between electromagnetic and mechanical waves. How does each carry energy? Give an example of each. 2. (3 pts) Draw diagrams to show reflection, refraction, and diffraction. 3. (3 pts) Define the terms transparent, translucent, and opaque to describe absorption. 4. (5 pts) List the waves on the electromagnetic spectrum in order from lowest frequency to highest frequency. 5. (2 pts) List the colors of visible light in order from lowest frequency to highest frequency. 6. (1 pt) How is the color of light determined? 7. (1pt) Compare the absorption of dark colored objects to light colored objects. 8. (1 pt) What happens to light waves when it travels from air into water? 9. (1 pt) How do you calculate wave speed? 10. (1 pt) Find the speed of a wave with a wavelength of 5 meters and a frequency of 70 Hz. 11. (1 pt) Do sound waves mover faster in solids or in gases? 12. (1 pt) When you increase the volume on your radio, what happens to the amplitude? 13. (1 pt) Girls' voices are usually high and boys' voices are usually low. Explain the differences between their pitch and frequency. 14. (1 pt) The sound wave with a higher frequency has a longer or shorter wavelength? 15. (2 pts): Give an example of something that happens in everyday life in order to describe the properties of sound (frequency, amplitude, etc). 16. (3 pts) Draw a transverse wave. Label crest and trough. 17. (3 pts) Draw a compressional wave. Label compressions and rarefactions. 18. (3 pts) Using either or both of your drawings, label amplitude, wavelength, and frequency. 19. (1 pt) What happens to a wavelength when the amplitude is decreased? 20. (4 pts): Sketch a reflecting and refracting telescope. How is light gathered and focused in each?
 * S8P4a Identify the characteristics of electromagnetic and mechanical waves.**
 * S8P4b Describe how the behavior of light waves is manipulated causing reflection, refraction, diffraction and absorption.** Answer the above GPS by doing the following:
 * S8P4c Explain how the human eye sees objects and colors in terms of wavelengths.**
 * S8P4d Describe how the behavior of waves is affected by a medium (such as air, water, solids).**
 * S8P4e Relate the properties of sound to everyday experiences.**
 * S8P4f Diagram the parts of the wave and explain how the parts are affected by changes in amplitude and pitch.**