Sound
Science ยท Grade 9 ยท Week 16 ยท 25 questions
Sound is a vibration that travels through air, water, and solids as waves. Understanding sound explains how we hear, how musical instruments work, and why echoes happen.
What you'll practise
- Explain how sound is produced and travels
- Describe properties of sound waves
- Understand pitch, loudness, and frequency
- Explain echoes, reflection, and absorption of sound
All 25 questions in this Sound quiz
Grade 9 Science โ Sound: 25 practice questions with instant scoring and explanations.
- Sound is produced by:
- Sound requires which of the following to propagate?
- Sound travels fastest in:
- Longitudinal waves are those in which:
- Transverse waves are those in which:
- Sound is an example of:
- The speed of sound in air at room temperature is approximately:
- When sound travels from air to water, what changes?
- The frequency range of human hearing is approximately:
- Sound with frequency below 20 Hz is called:
- Sound with frequency above 20,000 Hz is called:
- A sonic boom occurs when:
- The distance between two consecutive compressions or rarefactions in a sound wave is called:
- Which formula correctly relates wave speed, frequency, and wavelength?
- Sound travels at 340 m/s in air. If the frequency is 170 Hz, the wavelength is:
- Compressions and rarefactions are features of:
- The speed of sound is affected by:
- When sound travels from a denser to a less dense medium, it:
- Bats use ultrasound for:
- The properties of sound include:
- Sound can travel through:
- The SI unit of frequency is:
- When the frequency of sound increases, the wavelength:
- Which of the following is not a property of sound?
- The amplitude of a sound wave determines its:
Question 1 of 250 correct so far