Direction: Read the questions carefully. Choose the correct answer and write the letter of the correct answer on the space provided before the item number. 1. a Which of the following refers to the ratio of mass and volume of a substance? A. density C. sound B. elasticity D. wavelength 2. What do you call the disturbance that carries energy and travels through a medium? A. density C. sound B. elasticity D. wavelength 3. How can you describe Physical density? A. Physical density is described as the mass per unit volume of the medium. B. Physical density is described as a phenomenon in which white light separates into its component colors. C. Physical density is described as the bending of light when it travels from one medium to another of different optical densities. D. Physical density is described as the sluggishness of the atoms of a medium to maintain the absorbed energy before reemitting Which one is called the measure of the hotness or coldness of an object? A. evaporation C. heat B. freezing D. temperature​