1. Encircle the letter of the correct answer. 1. In an experiment, a pencil is placed in a glass half-filled with water. You found out that the pencil looked broken. What property of light is being shown in this experiment? a Reflection b. dispersion a refraction d. speed 2. The spreading of light when it passes through a prism or raindrops is called A reflection B. refraction C. dispersion D. sound 3. It is the bouncing back of light. a refraction b. dispersion a. echo d. reflection 4. Which of the following produces the loudest sound? a Jet b. piano c. telephone d. cry of a baby 5. Bats and whales use to locate their food and determine direction. a Vibration b. frequency a refraction d. echolocation 6. After a heavy rain Jenny noticed a ray of different colors in the sky. It is formed when the light from the sun passes through raindrops. What do you call these different colors? a. Reflected light b. rainbow c. refracted light d. shadow 7. The loudness and softness of sound is referred to as a Intensity b. volume c. frequency d. speed 8. is an undesirable sound which disturbs the activities of human or animal life. b. volume c. frequency d. speed 9. In which medium can sound travel fast? b. liquids a. Solids C. gas d. all of the above 10. It is a narrow but powerful beam of light. It is used to store information on CD, used by doctor to treat certain problems with internal organs. What do you call this? b. LASER a X-Ray aced. Ultrasound a. Noise a RADAR underlined words. ​