Crear juego
Crear juego
Todos los juegos
Jugar Test
1. 
Sound waves travel through...
A.
the air, metal , water and vacuum.
B.
the air, water, vacuum but not through metal.
C.
water, air and metal but not through vacuum
2. 
The speed of sound depends on the medium through wich it travels
A.
It is false. The speed of sound doesn´t change.
B.
It is true, It travels faster through iron than through water or air
C.
It is true, It travels faster through water or air than through iron
3. 
An echo is a reflection of a sound. It occurs when...
A.
object located at a distance of at least 7 metres, and doesn´t returns to where it started.
B.
object located at a distance of at least 27 metres, and returns to where it started.
C.
a sound reflects off an object located at a distance of at least 17 metres, and returns to where it started.
4. 
If a sound is reflected from a shorter distance, it mixes with the original sound producing ...
5. 
Sound has three characteristics, they are:
A.
Intensity, patch and timbre
B.
Pitch, timbre and intensity
C.
Strong, weak and high
6. 
Intensity is called too...
A.
Voice
B.
Volume
C.
Frequency
7. 
We can measure pitch in....
A.
Herz
B.
Decibels
8. 
Sound produces pain in human´s ears when...
A.
It is less than 120 DB
B.
It is higher than 120DB
C.
at 50DB,it is quite noisy
9. 
Pitch is the quality of sound that depends on the frequency of vibrations
A.
True
B.
False