Lto figure this out, he needs to design an experiment in which he plants seedlings in soils with levels of porosity and levels of permeability.
equal; equal
equal; different
different; equal
different; different

it is a

explanation:

the correct answer should be false

{apex}

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.