CBSE Science Class 8

Sound

Sound - Chapter Wise CBSE Solved Question and Answer Based On NCERT

Very Short Q&A:

Q1: Define sound.
View Answer
Q2: Sound can travel through
  1. Solid and gas
  2. Gas and liquid
  3. All of the above
  4. None of these
View Answer
Q3: Sound can travel in vacuum. True/ False.
View Answer
Q4: Sound is produced by _______________ objects
View Answer
Q5: Define noise.
View Answer
Q6: Define frequency
View Answer
Q7: What is the unit of frequency?
View Answer
Q8: Excessive or unwanted sound leads to____________________.
View Answer
Q9: What is the symbol of unit of frequency?
View Answer
Q10: What are the two important properties of sound?
View Answer
Q11: Define oscillatory motion.
View Answer
Q12: The frequency determines ________________ of sound
  1. Vibration
  2. Amplitude
  3. Shrillness
  4. Oscillation
View Answer
Q13: Name the factor on which the loudness of the sound depends upon.
View Answer
Q14: What do you mean by audible sound?
View Answer
Q15: What do you mean by non-audible sound?
View Answer
Q16: Why noise pollution is harmful for us?
View Answer
Q17: Voice of which of the following will have low frequency?
  1. Baby boy
  2. Baby girl
  3. A Woman
  4. A man
View Answer
Q18: The lower the frequency of vibration the higher the pitch. True/False
View Answer
Q19: Shrillness of a sound is determined by___________________ of vibration.
View Answer
Q20: Unwanted or unpleasant sound is termed as music.True/False
View Answer
Q21: Identify whether the following is a music or noise:
  1. Sound of table
  2. Sound of vehicle
  3. Sound of a loud speaker
View Answer
Q22: What is range of audible sound?
View Answer
Q23: What is range of in audible sound?
View Answer
Q24: In a classroom if all the students speak together, what would the sound produced be called?
View Answer
Q25: How can we minimise noise made by transport vehicles?
View Answer
Q26: How can we minimise noise made by industrial machines?
View Answer
Q27: Name some health disorder caused by noise pollution.
View Answer
Q28: What do you mean by hearing impairment?
View Answer
Q29: Name some sources available at home that may lead to noise pollution.
View Answer
Q30: In human beings sound vibration make the ____________________ vibrate.
View Answer
Q31: Why we should never put a sharp, pointed or hard thing into our ear?
View Answer
Q32: Define vacuum.
View Answer
Q33: What is vibration?
View Answer
Q34: Name some musical instruments.
View Answer
Q35: What is the importance of sound in our life?
View Answer



Chapter 13 Sound