The chemical composition of soil in a certain area was found to differ from that of the bedrock beneath it. Which statement would best explain the
difference in chemical composition?
A. The climate, especially rain and extreme temperatures caused the
soil to develop
B. Water washed iron oxide from the A horizon to the Dhorizon
C. The soll layers were mature because a large amount of time had
passed
O D. Water wind and gravity transported weathered particles gifrock to
new locations

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)