ICSE Class 7 Physics, Unit 6: Sound
From the CISCE curriculum. 6 key concepts, about 2 days of study at 20 to 30 minutes a day.
What this unit aims at
Sound is produced by the vibration of objects and different types of instruments are used to produce sound. In humans, sound is produced by the voice box or larynx. Sound needs a medium to propagate hence in vacuum it is not possible to hear one another. Sound wave is a longitudinal wave. A wave is characterised by an amplitude and a frequency. Like light, sound is also reflected from a surface. Sound is also absorbed by a medium. Therefore, walls of a theatre are lined with layers of materials that absorb sound. Sound travels with different speeds in different mediums and travels fastest in solids. This theme will enable children to know and understand 'Sound’, different sources of sound and how it travels.
Your child should be able to
- identify different sources of sound
- describe sound as a longitudinal wave
- define amplitude and frequency of sound
- demonstrate that sound requires a medium to transmit
- list examples of reflection and absorption of sound
- analyse the relative speed of Sound in different mediums
- design a sound-proof box
Key concepts in this unit
- Sources of sound.
- Sound as a longitudinal wave.
- Characteristics of a sound wave: Amplitude (Relate amplitude with loudness) and Frequency.
- Sound needs a medium to propagate.
- Reflection and Absorption of sound.
- Relative speed of sound in different mediums.
Teach this unit at home
- A day-by-day plan from the CISCE concepts, so you know what to cover each day.
- A step-by-step script for each day, so you know what to say and ask (AI-written from the CISCE curriculum, so check it against your child's school book).
- A quiz at the end.
From the CISCE Curriculum for Classes I to VIII (2016). CISCE sets what is taught, not the textbooks, so schools use different books and there are no page numbers here. Adhian Gurus is not affiliated with CISCE.