Class 8th Science Sound MCQ Test

Class 8th Science | Sound | MCQ Test Online

Name: Class:

1. In which of these mediums is speed of sound fastest?

Solid Gas Liquid None of these

2. What is the cause of sound?

Vibration Time Speed None of these

3. Which type of musical instruments produce music by vibration of membranes?

Stringed Percussion Wind None of these

4. Find the odd one out.

Sitar Drum Tuning fork None of these

5. On which component of sound wave does pitch depend?

Amplitude Time period Frequency None of these

6. What are the sound waves having frequency of more than 20,000 Hz called?

Infrasonic Ultrasonic Supersonic None of these

7. Which of the following correctly represents the speed of sound in solids, liquid and gas in ascending order?

Gas>Liquid>Solid Liquid>Gas>Solid Liquid>Solid>Gas Gas>liquid>gas

8. What is the boiling point of water?

50°C 90°C 100°C 150°C

9. The hearing range of human ear is

less than 20 Hz more than 20,000 hz 20 Hz to 20,000 Hz 20 Hz to 25,000 Hz

10. 1 Hz is equal to

1 vibration per minute 6 vibration per minute 60 vibration per minute 600 vibration per minute