CBSE · Class 9 · Science

Sound

Chapter 10Motion, Force, Work and SoundCBSE / NCERT · Secondary & Senior Secondary

2 worlds · 3 labs for this chapter.

Topics

Sound waves
- Longitudinal waves and a medium
- Frequency, wavelength and speed
- Pitch and loudness
- Echo and reverberation
- Echolocation

Learning objectives

Relate sound-wave properties to perception and calculate a wave speed or echo distance.

Worlds

Places to explore freely · 2 worlds

WorldThe Human Ear & HearingYou are not a visitor, you are the sound — carried through the ear with no stops while your own form is transformed six times
WorldSound & WavesEight sound experiments in two versions — a ruler, a bell in a jar, a sonometer, organ pipes, an echo, beats — and every sound has a visible form

Main labs

Built for this chapter · 2 labs

More labs

Also fit this chapter · 1 lab

LabWaves Interactive LabFrequency, amplitude

Practice

Questions for Class 9 Science, with worked answers, on screen or as a printed paper.

Open the question bank

CBSE · Class 9 · Science

Sound

Chapter 10Motion, Force, Work and SoundCBSE / NCERT · Secondary & Senior Secondary

2 worlds · 3 labs for this chapter.

Topics

Sound waves
- Longitudinal waves and a medium
- Frequency, wavelength and speed
- Pitch and loudness
- Echo and reverberation
- Echolocation

Learning objectives

Relate sound-wave properties to perception and calculate a wave speed or echo distance.

Worlds

Places to explore freely · 2 worlds

Main labs

Built for this chapter · 2 labs

More labs

Also fit this chapter · 1 lab

LabWaves Interactive LabFrequency, amplitude

Practice

Questions for Class 9 Science, with worked answers, on screen or as a printed paper.

Open the question bank

Topics

Sound waves

Learning objectives

Worlds

Main labs

More labs

Practice

Topics

Sound waves

Learning objectives

Worlds

Main labs

More labs

Practice