Check your score,class 7 , ch -Sound

Class 7 Quiz: Sound

1. Sound is produced by:

Vibrations Motion Pressure Force

2. Sound travels fastest in:

Air Water Solid Vacuum

3. The speed of sound is lowest in:

Solid Liquid Gas Vacuum

4. The unit of frequency is:

Hertz Seconds Meters Decibels

5. The pitch of a sound depends on:

Amplitude Frequency Wavelength Speed

6. The human hearing range is:

20 Hz to 20,000 Hz 20 Hz to 2,000 Hz 2 Hz to 2,000 Hz 2 Hz to 20,000 Hz

7. Loudness of sound is determined by:

Frequency Amplitude Speed Wavelength

8. Sound cannot travel through:

Water Air Vacuum Solid

9. The time taken for one complete wave is called:

Frequency Wavelength Time Period Speed

10. The formula to calculate speed of sound is:

Speed = Frequency × Wavelength Speed = Wavelength ÷ Frequency Speed = Frequency ÷ Wavelength Speed = Frequency + Wavelength