<span>When sediments move and settle somewhere, they are being deposited. When, over a long time, layers and layers of sediments get deposited on top of each other, the weight of the top layers presses down on the bottom layers, forming them into rock called sedimentary rock. The oldest layers are on the bottom, and the youngest layers are on the top. Because sediments sometimes include once-living organisms, sedimentary rock often contains a lot of fossils. </span>
I’m pretty sure psi describes air pressure
“chemo” refers to energy source (reformed molecules)how the organism obtains electrons (from the oxidation and reduction-redox)
“organo”-refers to electron donor (organic substrate and compound)
“heterotroph”-refers to carbon source (organic compounds).
Examples of chemoorganoheterotrophs are decomposers-obtain carbon and electron reactions from dead organic matter, herbivores and carnivores- obtain carbon and electron reactions from living organic matter.