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QUARTER 1- (Module 4-Sounds) PRETEST Directions: Read each statement carefully. Write the letter of the correct answer on your answer sheet. 1. How does the temperature of the medium affect the speed of sounde A. High temperature increases the speed of sound B. Hot weather does not affect the speed of sound C. Cold weather causes the speed of sound to move faster D. Cold temperature freezes the medium that causes vibration 2. What is the speed of sound in the air at a temperature of 25°C? A. 326 m/s B. 331 m/s C. 336 m/s D.346 m/s 3. What happens to the speed of sound as the temperature decreases A. The speed increases C. The speed decreases B. Speed becomes velocity D. The temperature has no effect 4. Which of the following best explain why are concerts held mostly at night A. Most people work in the morning/afternoon. B. Lights are an essential part of most events, it's almost impossible to do in daylight C. They have to spend the day getting ready for the concert and most people are at work in the day. D. At night, the layers of air near the ground cools faster than the layers up high The air layer near the ground is denser so the sound wave is slower in cold air. 5. Benguet experienced the coldest morning in 2016 while Tuguegarao province experienced the highest temperature. During that time, in which province could sound travel faster? A. Benguet B. Tuguegarao C. Both A and B D. None of these
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