Sound and Light Quiz Review Questions 6th Grade Science Mr ...

Sound and Light QuizReview Questions6 th Grade ScienceMr. Vehslage1. What is the speed of sound?750 miles/hour or 344 meters/second2. What is timbre?The unique sound that a musical instrument makes3. How does changing the frequency of a sound wave affect the sound itself?Changing the frequency (and therefore the wavelength) changes the pitch of thesound. Higher frequency (shorter wavelength) means higher pitch; lower frequency(longer wavelength) means lower pitch.4. How do SONAR and Echolocation work?Sound waves bounce off of objects and by measuring how long it takes for the echoto return to the listener, you can calculate how far away something is. Bats anddolphins use echolocation in hunting prey. SONAR is the man-made equivalent andis used in submarines where it is too dark to see underwater.5. How were we able to use the data that we collected in the gym to determinehow long it takes to hear an echo?Speed equals distance divided by time. We know the speed of sound is 344m/sec. Wemeasured the distance that the sound had to travel (length of the gym times 2). With thisinfo, we could calculate the time by dividing the speed by the distance.6. What does he EM in EM waves stand for?EM Stands for Electromagnetic. EM waves travel through electrical and magneticfields.7. Name two differences between sound waves and EM waves.Sound waves are longitudinal and EM waves are transverse. Sound waves aremechanical (they must travel through a medium), and EM waves are not, so they cantravel through a vacuum. Sound waves travel MUCH more slowly that EM waves.8. What is the “Speed of Light”?186,000 miles/second or 300,000 kilometers/sec

20. Name three things in the room that are giving off their own light.Overhead lights, the sun, clock, indicator lights, computers, etc21. Name three things in the room that are reflecting light.Anything that you can see that isn’t giving off it’s own light22. What color is the Smart Board?White23. In a room where there is no light at all, what color would the Smart Boardappear to be?It would appear black. With no light present, nothing will reflect off of it, and thewhole room will appear black