1 FACT OR BLUFF: Write FACT if the statement is correct and BLUFF if the statement is wrong on the space provided for every item. 1. In a low-density material, like air, sound travels faster because the atoms are farther apart. 2. The speed at which sound travels through a material depends on the density of the material 3. It is possible for astronauts on the moon to talk to each other without the aid of modern electronic communication system because of the atmosphere in the surroundings. 4. Sound is heard well in far areas during daytime than nighttime due to refraction. 5. Compressions are found when air particles of molecules of the medium are pushed creating lesser distance between particles. 6. Sound is produced when a vibration causes pressure variations in the medium . 7. Sound waves require a medium to travel, some kind of physical material 8. Compared to liquids, sound travel faster through gases. 9. Sound waves are the compression and rarefaction of physical material. 10. Sound waves travel through space. 11. The compression and rarefaction allows sound waves to travel through liquids and gases but not through solids. 12. Space is a vacuum, and a vacuum is defined by the very absence of physical material 13. A sound wave is a transverse wave. 14. The size of compression indicates how much energy the sound wave has. 15. Sound wave with large compression has a high energy​