15. Does the energy can be created or destroyed? a. Yes, since energy is not infinite b. Yes, because energy is the result of molecular motion c. No, it can transform into one another d. No, it can cause entropy
16. What does sound need in order to travel? a. Matter b. light c. fuel d. vacuum
17. A sound wave consists of a series of a. Compression and rarefactions c. perpendicular vibrations b. Longitude and latitudes d. hills and valleys
18. The speed of sound is directly affected in what factor in the medium? a. Odor b. Shape c. Texture d. Temperature.
19. ROYGBIV is the light color arrangement in the order of increasing a. Wavelength and energy c. Energy and frequency b. Wavelength and frequency d. Energy but decreasing frequency
20. Which of the following colors of light has the shortest wavelength? a. Red b. yellow c. blue d. Indigo ​