New Activity
Ico create Educaplay New Activity
All the activities
Play Quiz
1. 
Sound is produced when...
A.
an object vibrates
B.
an object is at rest
C.
none of the above
2. 
Sound is propagated...
A.
at low speed
B.
at high speed
3. 
How is the pitch of sound?
A.
high or low
B.
long or short
C.
soft or loud
4. 
How is the duration of sound?
A.
loud or soft
B.
high or low
C.
long or short
5. 
What is the unit that messures the number of vibrations per second?
A.
Decibels (dB)
B.
Hertzes (Hz)
C.
Persistence