What is Earths biosphere described as?

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.