Chapters
Chapter 2: Health and Diseases
Chapter 3: Force and Pressure
Chapter 4: Current Electricity and Magnetism
Chapter 5: Inside the Atom
Chapter 6: Composition of Matter
Chapter 7: Metals and Nonmetals
Chapter 8: Pollution
Chapter 9: Disaster Management
Chapter 10: Cell and Cell Organelles
Chapter 11: Human Body and Organ System
Chapter 12: Introduction to Acid and Base
Chapter 13: Chemical Change and Chemical Bond
Chapter 14: Measurement and Effects of Heat
Chapter 15: Sound
Chapter 16: Reflection of Light
Chapter 17: Man made Materials
Chapter 18: Ecosystems
Chapter 19: Life Cycle of Stars
Chapter 15: Sound
Balbharati solutions for General Science 8th Standard Maharashtra State Board Chapter 15 Sound Exercise [Page 109]
The region in a sound wave, with higher pressure and density, is called ________ and that with low pressure and density is called _________.
Medium is ___________ for generation of sound.
The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is __________.
Different sound notes have different ____________.
In loudspeaker ________ energy is converted into ________ energy.
Give scientific reasons:
It is essential to change the tension on the vocal cords, as we produce different sound notes from our larynx.
Give scientific reasons:
Astronauts on the moon can not hear each other directly.
Give scientific reasons:
As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.
How are different sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation?
How is sound produced in a human larynx and a loudspeaker?
Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
Match the following
| Human larynx | Vibrations of metal arms |
| Loudspeaker | Vibrations in air column |
| Jal-Tarang | Vibrations in vocal cords |
| Tuning fork | Vibrations in strings |
| Sitar | Vibrations of screen |
Chapter 15: Sound
Balbharati solutions for General Science 8th Standard Maharashtra State Board chapter 15 - Sound
Balbharati solutions for General Science 8th Standard Maharashtra State Board chapter 15 (Sound) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board General Science 8th Standard Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.
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Concepts covered in General Science 8th Standard Maharashtra State Board chapter 15 Sound are Frequency of Sound Waves, Sound and Music, Sound Produced by Humans, Sound Generation by Loudspeaker, Propagation of Sound, Production of Sound.
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