TRUE OR FALSE

1. The speed of sound depends on density, elasticity and temperature of a medium.

2. An echo occurs when a sound wave is absorbed.

3. The speed of sound decreases as the temperature increases.

4. Refraction of sound explains why sound is heard at longer distances at night than in day time.

5. The higher the temperature the faster the speed of sound.

6. Sound travel faster thorugh warm materials than cold materials.

7. Ships use echolocation to measure the depth of water.

8. Reflection of sound happens when sound wave changes as it passes from one medium to another,

9. Sound is produced due to vibration of air particles.

10. Sound energy travels in a form of longitudinal wave because vibrations are parallel to the direction of the wave.

Pahelp naman po, please ​