A slow change to the earth's surface would be the formation of mountain ranges over millions of years due to the shifting of tectonic plates under the earth. Also, another slow change could be considered erosion or weathering. Two rapid changes could be landslides and earthquakes.
<span>Alright.. this is what I have in mind... then you can judge if I'm totally crazy:
As in any other experiment we wish to only hold 1 variable, while other thinkable variables are held constant.
In addtion to that we need to ref. soil and call that 0.
Now some theory: We know from medicals they can have synergetic effect if mixed. Same can go for nutrients, we therefor test each soil mixed and alone and see the effect.
We call the nutrients A, B and C, (continue with more if you like)
Now this is our setups:
0, A, B, C, AB, AC, BC, ABC.
In this way we can make compare to a ref soil (0) and also check for synergetic effects... this is a bit considered a multivariable experiment, but we also have A, B and C as ref. against the mixed soils.</span>
Answer:
Biosphere -- the global ecosystem composed of biotic (living) factors and the abiotic (non-living) factors from which they derive energy and nutrients. AKA the ecosphere, is the worldwide sum of all ecosystems (all life on earth)
Hydrosphere -- the combined mass/volume of water located either on, under, and above the surface of a planet, minor planet, or natural satellite. This water is still counted regardless of its state (ie. liquid...gas...solid) and takes form as what we see as Rivers, Lakes etc
HOPE THIS HELPS!
