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 1C°.
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.​