An offshore oil platform houses a drill for drilling oil. The drill descends from the platform and enters the ocean. At the bott
om of the ocean, the drill starts to dig into the rock. It continues drilling into the rock for another 7,000 feet and then stops. Where does the drill stop?
in the biosphere
in the geosphere
in the atmosphere
in the hydrosphere
Bolus is the food that is mashed up in your mouth. After it is digested in the stomach, the food is called chyme. Bolus is more alkaline than chyme because it is exposed to alkaline saliva.
The earliest known life-forms are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya (billion years ago), relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the Earth 4.54 Gya.
