Can you me answer the following?
(worksheet “six degrees could change the world”)

Why is it essential to operationally define the variables in a study?

The use of fertilizer on a large farm would have the largest effect on which of the following? rate of photosynthesis in local plants amount of smog in the lower atmosphere rate of anaerobic respiration in aquatic bacteria extent of eutrophication in nearby water bodies rate of evapotranspiration from surrounding area

What property does soil or rock need to be permeable? a.)young b.)old c.)non porous d.)porosity