Rest in peace, Aron Eisenberg.

Nog, Captain of our hearts, first Ferengi in Starfleet.

Husband, friend, actor, podcaster, beacon of light and positivity in the Star Trek community.

Source: [x]

Glass is made of sand and earthbenders can bend sand (Book 2, Chapter 10, “The Library”) and furthermore earthbenders can bend the earth particles in metal (Book 2, Chapter 19, “The Guru”) so it stands to reason that they can bend the sand particles in glass. There is a question of whether or not they can still bend it because it is a very purified form of earth and another pure form of earth, platinum, is unbendable (LOK Book 1, Chapter 7, “The Aftermath”). However, when the sand is turned into glass it becomes crystalline (sand is mostly quartz particles after all) and we know earth benders can bend crystals (Book 1 Chapter 5 “The King of Omashu” when Bumi bends the creeping crystal).

Yes, airbenders can bend sound. This is shown when Aang bends sound by using his Appa whistle and extends the range of the sound (Book 2, Chapter 15, “Tales of Ba Sing Se”).