Class 4 Exam > Class 4 Questions > When did the sound of the train change?a)When...
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When did the sound of the train change?
- a)When the train was on station
- b)When the train was crossing the big river
- c)When the train stopped
- d)When the train crossed another train
Correct answer is option 'B'. Can you explain this answer?
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When did the sound of the train change?a)When the train was on station...
The sound of the train changed when the train was crossing the big river.
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When did the sound of the train change?a)When the train was on station...
Understanding the Change in Train Sound
When discussing the sound of a train, it's essential to recognize that various factors influence its auditory characteristics. The correct answer, option 'B,' indicates that the sound changed when the train was crossing the big river.
Factors Affecting Train Sound
- **Environment**: The acoustic environment drastically alters how sound travels. When a train crosses a big river, the open space and water can amplify or alter the sound waves produced by the train.
- **Echoes**: Large bodies of water, like rivers, can create echoes, which affect our perception of the train's sound. The reflection of sound waves off the water can make it seem different compared to other environments.
- **Speed and Dynamics**: As trains approach and cross a river, their speed and movement dynamics can change, affecting the pitch and volume of the sound. The combination of speed and the unique environment of a river can create a more pronounced sound.
Comparison with Other Options
- **On Station**: At a station, sounds may be muffled or absorbed by buildings and passengers, leading to less noticeable sound changes.
- **When Stopped**: A stationary train produces minimal sound, lacking the dynamic changes associated with movement.
- **Crossing Another Train**: While there might be some sound change, it is often less dramatic than the natural acoustics at a river crossing.
In summary, option 'B' reflects how the unique acoustic properties of a river environment significantly enhance or alter the sound of a train, making it the most logical choice.
When discussing the sound of a train, it's essential to recognize that various factors influence its auditory characteristics. The correct answer, option 'B,' indicates that the sound changed when the train was crossing the big river.
Factors Affecting Train Sound
- **Environment**: The acoustic environment drastically alters how sound travels. When a train crosses a big river, the open space and water can amplify or alter the sound waves produced by the train.
- **Echoes**: Large bodies of water, like rivers, can create echoes, which affect our perception of the train's sound. The reflection of sound waves off the water can make it seem different compared to other environments.
- **Speed and Dynamics**: As trains approach and cross a river, their speed and movement dynamics can change, affecting the pitch and volume of the sound. The combination of speed and the unique environment of a river can create a more pronounced sound.
Comparison with Other Options
- **On Station**: At a station, sounds may be muffled or absorbed by buildings and passengers, leading to less noticeable sound changes.
- **When Stopped**: A stationary train produces minimal sound, lacking the dynamic changes associated with movement.
- **Crossing Another Train**: While there might be some sound change, it is often less dramatic than the natural acoustics at a river crossing.
In summary, option 'B' reflects how the unique acoustic properties of a river environment significantly enhance or alter the sound of a train, making it the most logical choice.
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When did the sound of the train change?a)When the train was on stationb)When the train was crossing the big riverc)When the train stoppedd)When the train crossed another trainCorrect answer is option 'B'. Can you explain this answer?
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