They're practically... dust. When the sunlight bounces off from glass or windows, there's a sunlight beam and from there you can see dust particles flying in the air. Harmless of course. They just... fly around.
347573647362764325545467431765555167265492546254616531763 tonnesAcctually recent scientifical evidance suggests that dust particles have infinite massOne tenth the exact mass of a grain of sand.
Dust particles move around because of the air around it. Even though the dust particles aren't alive, they can still move because of the air around them and us!!!!!