I'm going to assume it is a fill in the blank
So the answer would be fat
I belive they studied rocks because that is what geological stands for.However they also studied glaciers and ice caps for seeds that contained pollen. The prehistoric 4imes often help us understand out history.
Buffers absorb the free hydrogen ions and hydroxide ions that result from chemical reactions. Because they can bond these ions, they prevent increases or decreases in pH. An example of a buffer system is the bicarbonate system in the human body.
