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Sound – Class 9 Science Complete Notes

1. What is Sound? Sound is a form of energy which produces a sensation of hearing in our ears. Sound is produced by vibrating objects. Examples include vibrating tuning fork, vocal cords in humans, bells, musical instruments, etc. Vibration: Rapid to-and-fro (back and forth) motion of an object. Short Question: Can sound be produced without vibration? Answer: No, sound cannot be produced without vibration. 2. Medium of Sound The substance through which sound travels is called a medium . Sound can travel through solids, liquids, and gases but cannot travel through vacuum . Process of Sound Propagation: When an object vibrates, it makes the air particles around it vibrate. These air particles move back and forth from their original (rest) position. The vibrating air particles push nearby air particles. This causes the nearby particles to also start vibrating. In this way, vibrations pass from one particle to another. This process continues through the medi...

CBSE Starts Free Counselling Support for Class 10 & 12 Students (2026)

Free counselling support for class 10 and 12 students by CBSE

A step by CBSE to reduce exam stress and support students emotionally.


The Central Board of Secondary Education (CBSE) has launched a free psycho-social counselling service for Class 10 and Class 12 students and their parents. This service is specially started to help students deal with exam pressure, stress, and emotional challenges before board exams.

Service Duration:
๐Ÿ“… Starts: 6 January 2026
๐Ÿ“… Ends: 1 June 2026
๐ŸŽฏ Covers the complete board exam period

๐ŸŽฏ Why Has CBSE Started This Support?

  • To reduce exam fear and stress
  • To help students stay confident
  • To guide parents in supporting their children
  • To promote healthy study habits

๐Ÿ“ž How Can Students Use This Service?

1. Tele-Counselling
๐Ÿ“ž1800-11-8004
๐ŸŒ Hindi & English support
๐Ÿ•˜ Monday to Friday
⏰ 9:30 AM – 5:30 PM
๐Ÿ’ฌ Talk directly with trained counsellors
2. Online Resources
๐Ÿ’ป Articles and guides on stress management
๐Ÿ“– Study planning tips and motivation
๐ŸŒ Available on CBSE official website cbse.nic.in.     

๐Ÿ‘ฉ‍๐Ÿซ Who Will Provide Counselling?

A team of 73 trained professionals including:

  • School Principals
  • Psychologists
  • Special Educators
  • Professional Counsellors

Some counsellors are also available from other countries like UAE, Nepal, Japan, and Qatar to help students globally.

๐ŸŒŸ Why This Support Is Important

Board exams are a big milestone in a student’s life. With this free counselling service:

  • Students can study with a calm mind
  • Parents can understand their child better
  • Exam preparation becomes healthier and stress-free
๐Ÿ’ก Tip for Students: Don’t hesitate to ask for help. A calm mind learns better!

๐Ÿ“ข Stay connected with our blog for more student-friendly updates.

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