What I Have Learned
Fill in the blanks to complete the statements. Write your answers on a
separate sheet of paper.
1. The speed of sound in dry air at 0°C is around
2. The speed of sound in air increases by
with every increase of 1Cº.
3. Sound exhibits the following properties:
and
4. The turning back of the wave as it hits the barrier is called
5. The reflected sound is known as
6.
refers to the multiple reflections or echoes in a certain place.
7. An application of sound reflection used by scientists to map seafloor and to
determine the depth of the ocean or sea is
8.
The
of sound involves a change in the direction of waves as they
pass from one medium to another.
9.
Sound waves travel
in cooler air than in warmer air.

pa help please po​