55 Which of the following causes of sound pollution accounts for most polluting noise in cities? A.Noise from construction sites B. Traffic noise C. Noise from animals D Noise from school sirens 56. An echo is produced when sound waves are __ ? A. transmitted through a medium B. absorbed by a surface C. reflected from a surface D. refracted into a second medium 57. Which one of the following forms of energy transfers between bodies as a result of temperature difference? A. Heat energy C Eleetrical energy B. Chemical energy D. Sound energy 5. Which of the following group of materials consists of only poor donductors of heat? water, steel, comper A iron, copper . aluminium plastic, blanket rubber B wood, steel, gold

Question

55 Which of the following causes of sound pollution accounts for most polluting noise in cities? A.Noise from construction sites B. Traffic noise C. Noise from animals D Noise from school sirens 56. An echo is produced when sound waves are __ ? A. transmitted through a medium B. absorbed by a surface C. reflected from a surface D. refracted into a second medium 57. Which one of the following forms of energy transfers between bodies as a result of temperature difference? A. Heat energy C Eleetrical energy B. Chemical energy D. Sound energy 5. Which of the following group of materials consists of only poor donductors of heat? water, steel, comper A iron, copper . aluminium plastic, blanket rubber B wood, steel, gold

Answer 1

55. The is B. Traffic noise. Traffic noise is the most common cause of sound pollution in cities. It includes the noise from vehicles, honking, and other traffic-related sounds. This noise can be very loud and disruptive, especially in densely populated urban areas.56. The correct answer is C. reflected from a surface. An echo is produced when sound waves are reflected from a surface. When sound waves hit a hard surface, they bounce back, creating an time delay between the original sound and the echo allows us to distinguish between the two sounds.57. The correct answer is A. Heat energy. Heat energy is the form of energy that transfers between bodies as a result of temperature difference. When two bodies with different temperatures come into contact, heat energy is transferred from the hotter body to the cooler body until thermal equilibrium is reached.58. The correct answer is C. plastic, blanket, rubber. Plastic, blankets, and rubber are poor conductors of heat. They do not allow heat to pass through them easily. In contrast, materials like iron, copper, and aluminum are good conductors of heat, meaning they allow heat to pass through them quickly. Wood, steel, and gold also fall into the category of good conductors of heat.

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