Why is river water less clear at the mouth than at the source? a)because the source is warmer
b) because the mouth is warmer
c) because the mouth has debris
d) because the source is colder

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?

Biology ! the conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as _[blank]_. filtration immigration reabsorption primary production

Which of the following forest management practices is best for reestablishing areas of forest?