Material through which water flows is permeable. This material can be either natural or artificial. Naturally permeable material can be clean sand and gravel for example, or a sandstone and in the latter case the sandstone can have both porosity which is not synonymous with permeability as the pores must be connected to be permeable. An impermeable membrane could be used to line ditches for example to prevent leakage near mines.
Not a lot besides the fact that they are both mixtures in water, because a solution is a mixture in which the solutes ( solids) dissolve, and suspension is a mixture in which the solutes don't dissolve.
Answer: C. there is more silicon than calcium at the surface of the earth
Explanation:
I apologize in advance if this is incorrect but what I was taught is that the correct answer is gather data to design a recovery plan.
The tilt of the earth's axis, which essentially "turns" certain parts of earth so that some parts receive more direct sunlight
