Nitrification and denitrification are important steps in the nitrogen cycle. What is the function of these steps? A. Balancing the level of oxygen in the soil.
B. Taking the nitrogen from the air.
C. Changing the form of nitrogen as it enters and leaves the soil.
D. Pulling nitrogen from the groundwater.

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?